Some policemen were sent there to ________ the villagers ________ the trees.
#99026
A
keep; cutting down
B
prevent; cutting down
C
prevent; to cut up
D
stop; to cut up
推荐题目
-Why does the Lake smell terrible?-Because large quantities of water__________. 
#104945
A
have polluted
B
is being polluted
C
has been polluted
D
have been polluted
Great changes _____ in this city over the past five years.
#100896
A
tookplace
B
havetakenplace
C
weretakenplace
D
havebeentakenplace
The situation wasn’t very good, but I ________ many worse situations.
#102325
A
was experiencing
B
experienced
C
would experience
D
had experienced