—Shall we go out for a walk?—Sorry, I can’t. I _______ my homework.
#42706
A
do
B
did
C
am doing
D
was doing
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—May I speak to the headmaster?—He’s not here．He _______ Beijing．Can I take a message?
#38056
A
has gone to
B
has been to
C
has gone
D
has been
--Surfing first started on the islands of Hawaii, didn't it?--Yes, but now it ______ by people all over the world.
#41747
A
is enjoyed
B
is enjoying
C
has enjoyed
D
will enjoy
--Be quiet! The children ____________ now. --Oh, sorry.
#42391
A
sleep
B
slept
C
were sleeping
D
are sleeping