I don’t know when my son __________back, but when he __________back ,I’ll give you a call
#40018
A
comes, comes
B
will come, will come
C
comes ,will come
D
will come, comes
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Robert is away. He _______ America since last week.
#36502
A
has been to
B
has joined a club in
C
has studied in
D
has become a manager in
–What are you going to do this Sunday? –I _____yet. 
#40265
A
won’t decide
B
didn’t decide
C
haven’t decided
D
don’t decide