高一英语下学期 Unit16 Scientists at work单元测

5.Which of the four should be a liquid at-90 degrees?

A.water B.alcohol C.nitrogen D.oxygen

6.Mixing alcohol and water is often used to wash windscreens of cars during the wintertime because _________.

A.it is easier for alcohol to change into gas

B.alcohol is not easily separated from water

C.alcohol freezes at lower temperature than water

D.the mixture is not expensive

7.In order to change water from a solid to a liquid energy must be _________.

A.removed B.added C.created D.destroyed

C

Flags have existed for over 3000 years.The earliest flags were wooden or metal poles topped with a carving.About 2000 years ago pies of fabric were added to some poles for decoration.Over the next 500 years the free-flying part of the flag became more important.

Every country today has its own flag.Many groups and organizations also have a flag which stands for,or symbolizes,the aims of the group.

The flag depicts (描绘)a world map,centered on the north pole.The map is surrounded by an olive(橄榄)wreath(花环)symbolizing peace and co-operation.The flag is blue and white.

8.Flags have been in existence for _________.

A.500 years B.over 3000 years

C.about 2000 years D.between 500 and 2000 years

9.A very old flag is likely to _________.

A.be made of fabric B.have a map on it

C.have white shapes on it D.be made of carved wood

10.An olive wreath is used to represent _________.

A.peace B.purity C.justice D.equality

七、Error correction(短文改错)10分

Mr.Smith was a biology professor,but he had 1._________

a lot of animal bones that he was very proud.Then 2._________

one year he managed to get a better job in others 3._________

university.As he was busy at the work,his wife asked 4._________

three men to remove all their things to the new house. 5._________

One of them was just about throw a large box into the 6._________

truck with all the other things,then Mrs.Smith ran 7._________

out and said,“Please treat the box gentle! It has 8._________

all of my husband's bones in it.” Heard this,the 9._________

man was so surprising that he nearly dropped it on his feet.10._________

八、Guided writing(书面表达)10分

2003年10月15日，神舟五号载人飞船发射升空，伴随着这一时刻的来临，所有的中国人都记住了一个名字，杨利伟，作为中国首位叩访太空的航天员，在太空中围绕地球飞行14圈后，杨利伟安全返回。我国首次载人航天飞行的成功，标志着中国人有能力攀登世界科技高峰，有能力把我们的国家建设得繁荣昌盛。