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11.Mary looks great this pair of trousers.

A.in 

B.by 

C.on 

D.at

12.The next morning people found the world outside their houses completely .

A.change 

B.changing 

C.changed 

D.to change

13.These books should not be from the library.

A.taken away 

B.taken off 

C.taken down 

D.taken over

14.By the time I got home£¬my grandmother the dinner and was watching TV.

A.prepares 

B.prepared 

C.has prepared 

D.had prepared

15.The reason the president kept silent is still unknown.

A.how 

B.why 

C.when 

D.what

´ð°¸11--15 ACADB

 

16.Ò»Will you please open the door for me?

Ò» .

A.Yes£¬please 

B.My pleasure 

C.Not at all 

D.You’re welcome

17.James got lost in the city£¬ he had to ask for help.

A.or 

B.SO 

C.but 

D.for

1 8.Mrs.Smith persuaded her husband the right thin9.

A.do 

B.did 

C.to do 

D.doing

19.My parents and I couldn’t get into the house last night because 0f US had the key.

A.all 

B.either 

C.neither 

D.none

20.Dogs have a very sense of smell.

A.nice 

B.clear 

C.good 

D.high

´ð°¸16--20 BBCDC