John is not a man to count on, and it is very...

John is not a man to count on, and it is very likely that the work ____ by the time he arrives here.

A. is finished　　　　 B. has finished

C. will finish　　 D. will have been finished

高一英语单项填空中等难度题查看答案及解析

John is not a man to count on, and it is very likely that the work ____ by the time he arrives here.

A. is finished      B. has finished    C. will finish     D. will have been finished

高一英语单项填空中等难度题查看答案及解析

It is generally accepted that _____ boy must learn to stand up and fight like _____ man.

高一英语单项填空中等难度题查看答案及解析

It is generally accepted that __________ boy must learn to stand up and fight like _______ man.

A. a; a        　　　 B. a; the             C. the; the        　　 D. the; a

高一英语单项填空简单题查看答案及解析

I used to think Jack was not a man to count on, but I have changed my ______ as he saved an old man from the fire.

A. state　　 B. condition

C. situation　　 D. position

高一英语单项填空中等难度题查看答案及解析

Not that John doesn’t want to help you, ______ it’s beyond his power.

A. but that　　　　 B. for that

C. and that　　　 D. in that

高一英语单项填空简单题查看答案及解析

Many people feel that dream is unique to humans. However, many dog owners will likely disagree on that. They have noticed that their dogs at various times during the sleep may shake legs, snort (哼) and sometimes growl (低声吼叫) which gives the impression that they are dreaming. These things may wonder us about whether dogs dream.

Scientists confirm that dogs probably do dream. It turns out that dog brains and human brains have many similarities during sleep cycles. Researchers used special machines to measure electrical activity in a dog’s brain and human’s brain. Scientists already knew that when humans dream, a certain part of the brain is active during sleep. Researchers discovered that the same part of the brain is active in sleeping dogs. Scientists have other data that back up these findings.

Many people dream that they are trying to move but cannot. Interestingly, part of that experience is not a dream. When people sleep, the brain produces a chemical that causes the dreamer to become temporarily paralyzed (使麻痹). Researchers think this happens so that people cannot physically act out dreams while they are sleeping. Dog brains make the same chemical. In one study during which this chemical was blocked, sleeping test dogs performed physical activities, such as standing up, sniffing around the room for imaginary rabbits, or chasing imaginary balls.

Because of these similarities, researchers believe that the content of a dog’s dream might come from the same source as a human’s dream. “People’s dreams are usually based on things they did that day,” says Dr. Samantha Hudspith. “So there is reason to believe that dogs dream about the things they’ve done that day. Of course, there will never be a way to prove this. Dogs cannot describe their dreams the way that humans can.”

1.What does the underlined phrase “back up” mean in the second paragraph?

A.Disagree. B.Support.

C.Record. D.Show.

2.What happened to a sleeping dog when this chemical mentioned in paragraph 3 was cut off?

A.It woke up. B.It stopped dreaming.

C.It acted out its dream. D.It couldn't move its body.

3.How is the text mainly developed?

A.By telling stories B.By giving examples.

C.By comparing details D.By listing differences.

4.What is the best title for the text?

A.Do Dogs Dream? B.Why Do Dogs Dream?

C.Signs of Dog Dreams D.Similarities Between Humans and Dogs

高一英语阅读理解困难题查看答案及解析

—You didn’t seem to enjoy your meal very much.

—It’s not that. I am just ____.

A. on a diet                  B. on diets

C. go on a diet                D. making a diet

高一英语单项填空中等难度题查看答案及解析

The children like their new house very much and it’s a real _____ that there is a swimming pool nearby.

A. award　　 B. reward

C. bonus　　 D. relief

高一英语单项填空中等难度题查看答案及解析

I have advised him not to do like that, but he still insists on doing it that way. I think he has his own opinion _________.

高一英语单项填空简单题查看答案及解析