--Have you got the leaving time of the train for me?---Yes, but you’d better ____of it by yourself.
#65863
A
make sure
B
be sure
C
to make sure
D
be certain
推荐题目
Great changes ___ in the recent years.
#80867
A
are taking their place
B
have taken place
C
have been taken place
D
take place
 Please keep me _____ what happens. 
#76116
A
informing by
B
informing of
C
informed of
D
informed by