Scientists estimate that walking as little as 30 minutes a day will help the immune system and give greater protection against ill health.（注意: help 的意思是make something better)

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estimate take delight in go by tend to chip away push on1. I fully agree to the arrangement and_____it. 2. We_____make mistakes when we do things in a hurry. 3. In spite of difficulties, t

estimate take delight in go by tend to chip away push on

1. I fully agree to the arrangement and_____it.

2. We_____make mistakes when we do things in a hurry.

3. In spite of difficulties, they decided to_____with the work.

4. Try to_____how many steps it will take to get to a close object.

5. My grandmother was becoming more and more sad and frail as the years_____.

6. It will be necessary to_____all the paint before applying a new layer.

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scrum框架包含的会议有（)。
A、Sprint计划会议(Sprint Planning Meeting)
B、每日站立(Daily Standup)
C、Sprint评价(Sprint Estimate)

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Scientists could see many things that most people would ______ to see。A. feelB. failC.

The scientists （) thousands of chemicals before they could find an effective cure that is suitable for the disease.

Many eminent scientists from all over the world came to china to ___ in the forum on nuclear physics.

Scientists say that much of______is covered with water.

For a long time scientists have suspected （) life exists on other planets besides the earth, but until recently, they had very little evidence to support this theory.

Scientists are now working on programs to ________ the place and time of earthquakes

Scientists are trying to find more ______ ways to make full use of solar energy
A、disrespectful
B、casual
C、efficient
D、punctual

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One day two scientists were quarrelling about whose watch was better, the German one or the Japanese one. Since they were scientists, they decided to do an experiment to test the watches. They went into their lab and filled a basin with water, put the watches in, waited for 20 minutes and took them out.
They could see there was something wrong with both watches. They observed them for several hours before speaking to each other. They both silently found the German watch was losing 60 minutes and the Japanese are doubled that.
The scientists with the Japanese watch then slowly raised his head and said, “Both watch are out of work, but my watch is right more often than yours, so it’s better.” The scientist with the German watch went home without saying a word.
(1) The two scientists were quarrelling at the beginning of the story, because_______.
A.the Japanese watch was better
B.the German watch was better
C.each of them thought his own watch was better than the other’s
D.both the watches were wrong
(2) They did an experiment because they_______.
A.wanted to know whose watch was better
B.liked their lab
C.wanted to repair their watches
D.had a basin of water in their lab
(3) After they did the experiment, they found_______.
A.both their watches were good
B.neither of their watches could tell the correct time
C.there was something wrong with the German watch
D.there was something wrong with the Japanese watch
(4) After putting the Japanese watch in water for 20 minutes, two scientists found_______.
A.it was a good watch
B.it went forward
C.it went faster than the German one
D.it went backwards 120 minutes
(5) How about the German watch at last？
A.It went more correctly than before.
B.It stopped working.
C.It went as well as the Japanese one.
D.It was better that the Japanese one.

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We live in a computer age. People ___21___ scientists, teachers, writers and even students use computers to do all kinds of work. But more than 30 years ago, computers couldn't do much. They were very big and expensive. Very ___22___ people were interested in them and knew how to use them. Today computers are smaller and ___23___. But they can do a lot of work, many people like to use them. Some people even have them at home.
Computers become very important because they can work faster than people and make fewer mistakes. Computers can ___24___ people do a lot of work. Writers now use computers to write. Teachers use them to help teaching. Students use them to study. Computers can also remember what you ___25___ them. Computers are very useful and helpful. They are our friends. Do you want to have a computer？
21)、
A.like
B.cheaper
C.few
D.put into
E.help
22)、
A.like
B.cheaper
C.few
D.put into
E.help
23)、
A.like
B.cheaper
C.few
D.put into
E.help
24)、
A.like
B.cheaper
C.few
D.put into
E.help
25)、
A.like
B.cheaper
C.few
D.put into
E.help