[题目]-Must I clean the classroom now?-No, you .A. mustn’t B. can’t C. needn’t 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】(2015年湖南娄底中考)—Must I clean the classroom now?

—No, you _______.

A. mustn’t B. can’t C. needn’t

【答案】C

【解析】句意：——我必须现在把教室打扫干净吗？——不，你不必。Must I do…?的否定回答是No, you needn’t.或者No, you don’t have to.根据否定回答。故选C。

练习册系列答案

Scientists know that parts of the brain become smaller in size with age. But in super-agers that goes much slower. In her recent study, Emily Rogalski, a neuroscientist (神经科学家), showed that super-agers have young brains. The area of the brain for attention and memory was shown to be thicker in super-agers. “When we look at a super-ager’s brain, we see that it looks more like a 50-year-old brain than an 80-year-old one.”

Scientists say super-agers have several things in common, including an active lifestyle. Many travel and play sports. They are often big readers. And they usually have healthy relationships and spend time with friends. “Growing old,” she adds, “does not have to be depressing and sad. Perhaps, if we expect a little better from ourselves, we will understand that not all aging makes us doom and gloom (愁闷).” Rogalski jokingly said that super-agers do not grow on trees — meaning they are special and few. She says she wants to find out why a super-ager’s mind is working so well and not aging as quickly as most.

The science behind super-aging is a new, but growing field. Scientists in the research offer this advice as we age: Stay active. Learn new things. Challenge yourself. Develop healthy relationships.

【1】In Emily Rogalski's recent study, what does she find?

A.When people get older, the ability to think and remember starts to become worse.

B.Super-agers have nothing in common with each other.

C.Super-ager’s brain looks younger that it really is.

D.The area of the brain for attention and memory was shown to be thinner in super-agers.

【2】Where will you probably read this article?

A.In a math book.

B.In a love story.

C.In a health research report.

D.In a sports magazine.

【3】What can we infer from the passage?

A.Scientists haven’t found out all the secrets to super-aging.