By the end of the last month, I _____________ all the CDs of Justin Bieber.
#41903
A
collect
B
collected
C
have collected
D
had collected
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I don’t know if he          tomorrow. If he        tomorrow, I will ring you up. 
#37252
A
comes, comes
B
will come, comes
C
will come, will come
D
comes, will come
We _______go to the park if it _______rain tomorrow.
#38100
A
don’t,isn’t
B
don’t,stop
C
shall,doesn’t
D
aren’t,doesn’t