A.宾语

B.定语

C.主语

D.状语

正确答案：主语

7、与电压源相连的灯形成一个简单的电路。A lamp（）to a voltage source forms a simple circuit.

A.connected

B.connecting

C.to connect

D.connect

正确答案：connected

第五章单元测试

1、The shocking news mad me realize（）terrible problems we would face.

A.that

B.how

C.what

D.why

正确答案：what

2、It is still under discussion（）the old bus station should be replaced with a modern hotel or not.

A.when

B.which

C.where

D.whether

正确答案：whether

3、I am afraid he’s more of a talker than a doer， which is（）he never finishes anything.

A.where

B.that

C.when

D.why

正确答案：why

4、Before a problem can be solved， it must be obvious（）the problem itself is.

A.what

B.that

C.why

D.which

正确答案：what

5、Twenty students want to attend the class that aims to teach（）to read first.

A.how

B.why

C.what

D.who

正确答案：how

6、A body velocity is not constant is said to be accelerateD.

A.which

B.whose

C.who

D.that

正确答案：whose

7、电子虽小，但它们在形成电流方面发挥了重要作用。Small（）electrons are， they play an important role in the formation of electric current.

A.even though

B.no matter how

C.as

D.while

正确答案：as

第六章单元测试

1、If I（）you， I’d join the army.

A.were

B.would be

C.am

D.was

正确答案：were

2、“If the sun（）tomorrow， what would we do？”

A.did not rise

B.would not rise

C.does not rise

D.will not rise

正确答案：did not rise

3、If you（）to see Mary， what would you tell her？

A.will be going

B.must

C.were

D.are

正确答案：were

4、I would have said “Hello” to him if I（）your brother.

A.will have seen

B.will see

C.had seen

D.could see

正确答案：had seen

5、If you had wanted to buy a record， what（）？

A.would you be buying

B.had you bought

C.would you buy

D.would you have bought

正确答案：would you have bought

第七章单元测试

1、It（）Mike and Mary who helped the old man several days ago.

A.had been

B.was

C.were

D.are

正确答案：was

2、It was not until 1920（）regular radio broadcasts began.

A.when

B.that