题目内容

一Must I come at 6: 30 tomorrow morning?

—No,you needn’t. You come one hour later.

A.can B.need C.should D.must

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We’ll start our journey _______ the morning of December 15.

A.in B.by C.on D.at

Some people have no choice but their dogs in small spaces.

A.keep B.keeping C.to keep D.kept

Young sunflowers turn and swing every day. New findings add to evidence that the plants are animal-like.

Harmer, a professor in the University of California at Davis, Department of Plant Biology, carried out a series of experiments on sunflowers in the field, in pots outdoors and in indoor growth chambers.

By staking plants so that they could not move, Harmer showed that he could destroy their ability to track the sun. He also noticed that sunflowers prevented from moving were not as tough and leafy as those that were free to move. When plants were moved indoor with a settled overhead light, they continued to swing back and forth for a few days.

The indoor plants did start tracking the “sun” again when the apparent source of lighting was moved across the room. The plants could reliably tack the movement and return at night when the artificial day was close to a 24-hour cycle, but not when it was closer to 30 hours.

When sunflowers track the sun, the east sides of their stems grew more rapidly than the west sides. At night, the west sides grew faster as the stem swung the other way. The team identified a number of genes that were expressed at higher levels on the sunward side of the plant during the day or on the other side at night. A plant growth-regulating hormone (激素), called auxin, appears to be a key driver.

The “dance” to the sun cycle obviously slows when the sunflower matures (成熟) and its flowers open up. At that point, the plants stop moving during the day and settle down facing the sun in the east.

“Bees like warm flowers.” Harmer said, adding that the bees are cold-blooded, so landing on a warm flower saves them energy and perhaps feels really good.

“The morning warmth changes the flowers in a way to make them more appealing to insects, perhaps causing them to release more attractive scents earlier in the day.” he said “We’re currently testing this idea.”

1.Why did Harmer do the experiment on sunflowers?

A.To see how sunflowers grow up B.To show what sunflowers’ genes are.

C.To study why sunflowers track the sun. D.To check if sunflowers swing in cloudy days.

2.What does the underlined word “staking” probably mean in Paragraph 3?

A.breaking B.controlling C.growing D.searching

3.What is the result of sunflowers being stopped from moving?

A.They will produce a number of new genes. B.They will grow faster than usual.

C.They won’t swing back though set free. D.They won’t grow well.

—Hello. May I speak to Mary?

—Sorry. She to museum just now.

A.go B.went C.goes D.will go

温馨提示：此题请答在答题纸上。

People sometimes like to read stories of dogs very much. They think that dogs are much cleverer than cats, sheep, cows or other animals in their homes.

One of my close friends, Bob, has a very large police dog named Jack. Every Sunday afternoon, Bob and Jack have a walk in the park nearby. Jack likes these walks very much. One Sunday afternoon, I paid a visit to my friend. I stayed there for a long time and my friend and I had much more talk with each other than ever before. Soon it was time for them to take a walk in the park. We forgot that. Jack became worried about it. He walked around the room several times and then sat down in front of me and looked at me. But I still paid no attention (注意) to him. I went on talking with my friend. At last, Jack could not wait any longer. He went out of the room and came back a few minutes later. He sat down in front of me again. But this time, he held my hat in his mouth. Suddenly, I understood what Jack meant and so did my friend.

1.Are there two people in this story?

___________________________________________

2.What does Jack like to do every Sunday afternoon?

___________________________________________

3.Why was Jack worried?

___________________________________________

4.What did Jack want me to do by holding my hat in his mouth?

___________________________________________

5.What happened next?

___________________________________________

— Let’s play computer games. —That _______ fun.

A.is sound B.sound C.sounds D.is sounds

完成句子：根据所给汉语意思，用单词或短语完成下列英文句子。

1.她的老师因为她在期中考试中的优秀成绩表扬了她。

Her teacher ______________ her for her excellent grades in the mid-term exam.

2.我认为双方观点都有道理。

I think both sides ______________.

3.每次我给你打电话，你的电话总是占线。

______________ I tried calling you, your phone line was always busy.

4.在我们学校的运动会上，贾森和马特同时越过终点线。

Jason and Matt crossed the finish line ______________ in our school’s sports meeting.

5.直到去年年底，他才适应了广州的天气。

He didn’t ______________ the weather in Guangzhou until the end of last year.

Jimmy is very funny. I stay with him, I like him.

A.The longer; the most B.The longest; the most

C.The longest; the more D.The longer; the more

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