—Sam, come downstairs, please. I need your help.—Sorry，mum. I on the phone..
#41572
A
am talking
B
talked
C
was talking
D
have talked
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-- It’s a nice camera. -- Yes, my uncle______for my last birthday.
#38309
A
buy
B
have bought
C
will buy
D
bought
－When should I hand in my paper? －It after class.
#39356
A
must be handed in
B
is handed in
C
was handed in
D
will hand in