Read the following article and select the best answer. Article: Mary Somerville was born in 1780 in Burntisland, Scotland. Her contribution to mathematics was in both algebra and differential and integral calculus . Mary was one of the world's first famous female mathematicians. She became interested in mathematics and decided to study it at the time when it was considered unacceptable for a woman to do so. She bought books on algebra and geometry and read them at night. In spite of disapproval from people around her, she firmly went on with her struggle to learn. She won a prize for her solution to an algebra problem. She went on to write several books on mathematics. Later in her life, she thought deeply about the years in which she had persevered almost without hope and said, "It taught me never to lose heart." Mary's way of learning remains useful today. If she worked for a while on a problem without coming up with an idea, she stopped working and turned her attention to the piano, her needlework, or a walk outdoors. She then returned to the problem with a fresh mind and a solution turned up. If she could not understand a passage while reading, she would forget about it and read on; several pages later, the meaning of the puzzling passage would become clear to her. Question: Why did Mary decide to study math? - Because she found math interesting and wanted to study it. - Because she was one of the world's first famous female mathematicians. - Because it was not considered acceptable for a woman to study math. - Because she was bored and had nothing to do.
Because she found math interesting and wanted to study it.

Read the following article and select the best answer. Article: You are standing in the kitchen and a voice says, "Add a little more salt to that soup." Yes, it's always nice to have someone help you when you're cooking. But this voice is not from a man. You are alone! Then where does it come from? Is it from a ghost? No, this isn't a ghost kitchen--it's the kitchen of the future. Scientists are working to improve everything in the kitchen, from fridges to tables, and even the ways we cook. They are making a system. It will help a person cook a meal. You don't need cookbooks. You can hear how to cook food. The fridge of the smart kitchen has a scanner. It looks at the foods in the fridge. It will order more milk from the store when your milk has gone bad or there is no more in the fridge. The gloves will test the temperature of everything they touch and say, "Need to cook longer" or "Hot and ready to eat". If you leave them on the stove by mistake, they'll say, "Fire!" Even the knives and spoons will speak. For example, if your food is bad, the knives and spoons will tell you not to eat it. The future kitchen may look wonderful, but it's not cheap. The multimedia fridge costs about 8,000 dollars. So even though high-tech kitchens are no longer a dream, not everyone can afford one. Question: The fridge of the smart kitchen has a scanner and it can _ . - help you do everything - clean the fridge when it's dirty - give you a warning when there's something wrong - talk with you
give you a warning when there's something wrong

Read the following article and select the best answer. Article: It was another rainy day, it had stopped raining but the ground was still wet, with this remarkable smell of freshness, I was in the car with my friend, and ahead of us was a pitiful-looking old man, with a walking stick in his hand as it seemed he was having a hard time standing up or barely doing any effort. I have always had a weakness for old people; they break my heart, especially the ones begging on the streets, or selling flowers, I feel sad for them, having to be on the streets instead of being taken care of by their families or the government. There was a car in front of us before we reach next to him. I had prepared money in my hand to give it to him, and I was looking at the car in front of us when the driver took a bill of money and threw it off the window--he threw it in the face of the old man and it fell on the ground, in a wet spot. The old man looked at the bill with a sad look, knowing it would take him an enormous effort to pick it up and he was hardly standing up, so I opened the car door, ran to him as he was bending to pick it up, took it, wiped it with my jeans since it was almost wet, gave it to him and gave him the money I had prepared for him. The look on his face when he saw me doing that was the most rewarding look anyone has ever given me. He was shocked, and started thanking me for what I did and asking God to bless me, but I couldn't hear a word of what he was saying, I couldn't look him in the eye, how can someone so sweet like him with a kind and gentle look be left on the streets? Helping him out surely made his day, but what he didn't know is that he affected me in a way he could never imagine--I still think about him very often, and I just hope everyone will look at old people the way I do. Question: In the author's opinion, who should be responsible for caring for old people? - Old people themselves. - Some kind-hearted people. - Their families or the government. - Some non-governmental organizations.
Their families or the government.