Dogs are kept to ______ the houses from thieves at night.
#81404
A
guard
B
defend
C
protect
D
prevent
推荐题目
It is a slow process to _______ a good knowledge of English.
#67178
A
acquire
B
earn
C
assist
D
control
The most serious problem we are facing now is how to ______ all the pollution. 
#72525
A
get rid of
B
get on with
C
get through with
D
get down to
 More attention must be paid _          ___ the endangered animals.
#66483
A
protect
B
to protect
C
to protecting
D
protecting