Read the following article and select the best answer. Article: COLUMBUS, Ohio--The heart operation taking place in the pale-green operating room at the Ohio State University Medical Center was unusual. The patient, a 62-year-old man, was made to sleep, tied with blue drapes and lying face up on a narrow table. But no one was touching him. Instead, the operation was being performed by a robot, whose three metal arms went through pencil-sized holes in the man's chest. At the ends of the robot's arms were tiny metal fingers, with turning wrists, which held a tiny instrument, a light and a camera. The robot's arms and fingers were controlled by Dr. Randall K. Wolf, sitting at a computer in a corner of the operating room about 20 feet away. This sort of operation, heart surgeons say, is the start of what may be the biggest change in their profession since heart bypass surgery began nearly 30 years ago. "The reason we make cuts is that we have big hands," said Dr. Wolf, the director of the surgery at Ohio State. The robot's _ fingers, no longer than a nail on the small finger, at the end of the long sticks could work better. Eventually, surgeons believe, most heart surgery will be done by robots whose arms are put in through pencil-sized holes punched in patients' chests. Instead of directly staring into a patient's body, surgeons will view magnified images of the operation on computer screens. In theory, the doctor would not have to be in the same room, or even the same country, as the patient. Question: The main idea of this passage is that heart surgery by robots _ . - is quicker than surgery done by doctors - may replace surgery done by doctors - is a new and risky procedure - was developed at Ohio State University
may replace surgery done by doctors

Read the following article and select the best answer. Article: Andy loved the first grade. He loved his teacher,Mrs.Parks. He loved playing games on the playground. He loved learning about dinosaurs and the solar system . Every morning Andy's mother dropped him off in front of his school on South Street. One foggy morning,the traffic was so bad on South Street that she decided to drop him off behind the school. Andy walked for about ten minutes and got to the gate. He held the icy handle,but it didn't move!Using both hands,he tried his hardest and finally the gate opened. After Andy closed the gate behind him,he looked in the direction of the teaching building. But all he could see was fog. He got to the spot where the slide had always been,but it was not there."The slide is gone!" he cried. He walked a little more to look for the swings,but they were not where they had always been."The swings are gone!" he cried again. Andy kept walking. He was so anxious to see the school that he fell and landed on the ground. He still couldn't see the school. A terrible thought appeared in his head."The school is gone!" he cried sadly. No more games with Jennie,Angel and Dillon,he thought. No more reading about dinosaurs. No more watching videos on the solar system... Suddenly the boy saw something up ahead."It's Jennie!"he shouted. Then he saw the outline of a school building. His school was still there!He was full of excitement! "Hi,Jennie!" he stood up and caught up with the girl."I couldn't see the school. I thought it was gone." Jennie just laughed."You're so silly." "What happened to the slide and the swings?" Andy asked. "We will have new playground equipment today," Jennie answered."The old equipment was taken away last night. Don't you remember Mrs. Parks telling us about it yesterday?" "I guess I forgot," Andy said,smiling."Anyway,I'm glad the school is here." Question: Why didn't Andy see the school building before he met Jennie? - Because his eyesight was not very good. - Because he went in the wrong direction. - Because there was heavy fog that morning. - Because he was not concentrated then.
Because there was heavy fog that morning.

(Q).
Read the following article and select the best answer. Article: Earth Day is on April 22nd.People say thanks to the Earth and learn ways to keep the Earth safe and clean.But saving the Earth is not just for grow-ups.Kids are also taking an active part in it. The American writer and filmmaker Lynne made a film called Young Voices for the Planet.It lists a lot of stories about different kids who help to keep our environment clean. Team Marine, US A group of students at Santa Monica High School started an organization called Team Marine.They tell people why plastic bags are bad for sea animals and environment.In 2011, they successfully made lawmakers in their city stop people using plastic bags. Felix, 15, Germany In 2007, a 9-year-old boy, Felix, started a club,Plant for the Planet.It encourages children around the world to plant trees in their own countries.Felix helped plant 25 million trees in Germany and 120 million trees worldwide. Alec, 17, US When he was 12, Alec set up Kids VS Global Warming.It teaches kids about weather change and ways to stop the world getting warmer and warmer.Alec travels widely to encourage people to help stop global warming.He has given more than 70 talks across the country. Olivia, 13, US When Olivia was 11, she heard about the 2010 oil spill in the Gulf of Mexico.She painted 500 pictures of birds to raise money for the clean-up.She raised more than $200,000 to protect birds and other wild animals. Question: What is the purpose of setting up the "Earth Day" and who can do something for the Earth? - To keep the earth peaceful and beautiful by adults and kids - To keep the earth balanced by adults only - To keep the earth safe and clean by adults and kids - To keep the earth safe and clean by kids only
(A).
To keep the earth safe and clean by adults and kids