Mum，you really need to have a rest！You ________in the kitchen ever since you came back home three hours ago.
#99412
A
had worked
B
were working
C
have been working
D
worked
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—Is there any possible way to help them get rid of such a bad habit?—To tell the truth, it’s very hard. But we ________ on this problem, trying to improve the situation .
#101218
A
worked
B
had worked
C
are working
D
had been working
--Have the police found the parents of the baby found by the road? ---Not yet. His identity ______.
#102907
A
would be found out
B
has been found out
C
is being found out
D
had been found out
I’ll be going to school on foot while my bicycle________.
#100732
A
is being repaired
B
is repaired
C
will repaired
D
has been repaired
Food will include buffalo that________________ over an open fire .
#103303
A
roasts
B
is roasting
C
will be roasted
D
had been roasted