国开电大《理工英语4》单元自测5（10分）答卷

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1.??What errands did you have to do today?

??___________________________.?
A.I??m in no hurry
B.Done one, and another one to do.
C.You can??t be serious
??°?:B

2.??Oh, by the way, how was your report of the new batteries coming along?

??___________________________.?
A.It's going pretty well
B.Just go ahead
C.Well, I'm afraid so
??°?:A

3.??Good morning, Jeff. Would you mind going to get me a cup of coffee at the Starbucks?

??___________________________
A.Thank you for reminding me.
B.No problem! You want the usual?
C.You must be joking.
??°?:B

4.This is a highly ______?new heating system.

?
A.efficiency
B.efficient
C.efficiently
??°?:B

5.It is _______ an interesting story that I want to read it again.
A.so
B.such
C.many
??°?:B

6.?????????í?????????????????????ù????????????A??B??C??????????????????×?????????

Climate change has caused a rise in sea levels. This has increased    1    salt in fresh water used on coastal farms. As a result farmers are increasingly    2    to use fields close to the sea.

Scientists call this process ?°salinization?± which means a mixture of salt and water. Salinization is reducing the world??s irrigated lands    3    1 to 2 percent every year.

But a farmer in the Netherlands is now using a mixture of sea and fresh water to grow healthy and tasty vegetables. Marc Van started with an    4    . ?°We put in a lot of plants in the fields and then we put in, put them in fresh water and in sea water and all the varieties between it, and then we see which variety is surviving and which variety is    5    .?±
(1).__1__
A.an amount of
B.the amount of
C.a number of
??°?:B
(2).__2__
A.unable
B.able
C.possible
??°?:A
(3).__3__
A.to
B.by
C.at
??°?:B
(4).__4__
A.investment
B.examination
C.experiment
??°?:C
(5).__5__
A.living
B.dead
C.dying
??°?:C