Problem: Write a multi-choice question for the following article, with the given choices and answer: Article: My teenage son Karl became withdraw after his father died. As a single parent, I tried to do my best to talk to him. But the more I tried, the more he pulled away. When his report card arrived during his junior year, it said that he had been absent 95 times from classes and had six falling grades for the year. At this rate he would never graduate. I sent him to the school adviser, and I even begged him. Nothing worked. One night I felt so powerless that I got down on my knees and pleaded for help. "Please God, I can't do anything more for my son. I'm at the end of my rope. I'm giving the whole thing up to you." I was at work when I got a phone call. A man introduced himself as the headmaster. "I want to talk to you about Karl's absences." Before he could say another word, I choked up and all my disappointment and sadness over Karl came pouring out into the ears of this stranger. "I love my son but I just don't know what to do. I've tried everything to get Karl to go back to school and nothing has worked. It's out of my hands." For a moment there was silence on the other end of the line. The headmaster seriously said, "thank you for your time", and hung up. Karl's next report card showed a marked improvement in his grades. Finally, he even made the honor roll. In his fourth year, I attended a parent-teacher meeting with Karl. I noticed that his teachers were astonished at the way he had turned himself around. On our way home, he said, "Mum, remember that call from the headmaster last year?" I nodded. "That was I. I thought I'd play a joke but when I heard what you said, it really hit me how much I was hurting you. That's when I knew I had to make you proud." Options: A Children in single-parent families often have mental problems. B Mother's love plays an important role in teenagers' life. C Being understood by parents is very important to teenagers. D School education doesn't work without full support from parents. Answer: B Mother's love plays an important role in teenagers' life. Question:

A: What is the main idea of this passage?

Problem: Given the question: Write a multi-choice question for the following article, with the given choices and answer: Article: In the United States, the number of children affected by divorce grows by about one million each year. As the number increases, experts continue to debate the effects of divorce on children. Some experts say divorce is harmful to children. Some studies show that children of divorce have more problems. For example, some children of divorce are more often aggressive toward parents and teachers. They have a greater risk of leaving school before completing their studies. They have more health and learning problems. However, experts note that these problems are not necessarily caused by divorce alone. During the 1970's, many Americans believed that divorce was the best solution for married people who were not happy. People did not think divorce would harm children. They thought children would go through a period of change when their parents ended their marriage. Then the children would be all right. These beliefs have changed in recent years. Researcher Judith Wallerstein studied more than one hundred children of divorce over a twenty-five-year period. She says some children never recover from divorce. She says they often have problems with their own adult relationships as a result of their parents' divorce. Ms. Wallerstein says her study proves that parents should stay together for their children, even if they are unhappy. However, some people say that children suffer more in a situation where there is much conflict. They say it is better for children to live with one divorced parent than to live with two parents who are angry and unhappy. Other experts note that many children of divorce do not have serious problems. This is because their parents are able to deal with the situation in a responsible way. Experts say that some people who get divorced are able to put the needs of their children first. They say that they are able to show the children that their love and support will continue after the divorce. Options: A it is better for parents not to divorce B children should not stay with divorced parents C it is better to live with one divorced parent D children of divorced parents don't have serious problems Answer: A it is better for parents not to divorce Question:
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The answer is:
According to Ms. Wallerstein, _ .

[Q]: Write a multi-choice question for the following article, with the given choices and answer: Article: One Monday morning, Paul and his classmates were in science laboratory for their practical chemistry lesson. The students were going to work in pairs to do an experiment. Before they began, the teacher gave them this description of the different stages of the experiment. Stage 1: Prepare the equipment: a test tube, a crucible, a Bunsen burner and tongs. Stage 2: Weigh 5 grams of baking soda (sodium bicarbonate) and put it in a crucible. Stage 3: Heat 10 ml of hydrochloric acid in a test tube. Stage 4: Pour the warm acid onto the baking soda and continue to heat the mixture. Result: The acid reacts with the bicarbonate to form water, carbon dioxide gas and salt. The hotter the mixture, the quicker the reaction. Continue to heat the mixture until the water evaporates, leaving the salt in the crucible. Paul and his partner followed the instructions and set up their equipment. Paul went to the cupboard to get a bottle of hydrochloric acid. He found that there was only one bottle in the cupboard so he took that. There was no label on the bottle and Paul didn't check with the teacher if it was the right solution. He measured the liquid and poured it into a test tube. Using tongs to hold the test tube, he heated it over the Bunsen burner. That's when things started to go wrong. The liquid in the test tube was not hydrochloric acid. When it was heated, it formed a thick cloud of white gas. Soon the room was full of this strong smelling white gas. All the students started coughing and their eyes hurt. The teacher immediately opened the windows and ordered the students to leave the laboratory at once. She realized that the liquid was a crylamide and that it is poisonous. Fortunately, nobody was injured in the incident. However, it taught the students and the teacher a good lesson. Options: A He went to the cupboard to get the bottle by himself. B He found that there was only one bottle in the cupboard so he took that. C There was no label on the bottle. D Paul didn't check with the teacher that it was the right solution. Answer: D Paul didn't check with the teacher that it was the right solution. Question:
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[A]:
Why did Paul make the mistake?