David is clever and quick at work,           he is honoured with the title of model worker.
#93904
A
which
B
where
C
for it
D
for which
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At the meeting place  of the Yangtze River and Jialing RIiver    ,one of the largest cities in china.
#93510
A
lies Chongqing
B
Chongqing lies
C
does lie Chongqing
D
does l Chongqing lie
Loulan is believed __________ over by sandstorms gradually from AD200 to AD400.
#92411
A
to cover
B
to be covered
C
to have covered
D
to have been covered
________, the boy couldn’t enter his house. 
#94032
A
Since the key has lost
B
The key been lost
C
Lost the key
D
Having lost the key
We should think of ways to stop the waste from the factory _____ our living environment. 
#94851
A
being polluted
B
polluting
C
from being polluted
D
polluted