Scientists also have no idea how long it will be before all wild animals in the cages _____.
#99827
A
should be set free
B
will be set free
C
are set free
D
would be set free
推荐题目
—Your spoken English is so good. Have you been abroad?—Yes. I in London for two years.
#102968
A
have stayed
B
stayed
C
had stayed
D
have been staying
The mother many things to get her daughter a good education.
#101177
A
purchase
B
produce
C
sacrifice
D
store
.---I’m sorry, but there’s no smoking room in this section on the train. ---Oh, I _____ that, and I won’t smoke again.
#103681
A
don’t know
B
won’t know
C
didn’t know
D
haven’t known
In 89 BC, Pompeii became a rich and busy city and near the city ____ a volcano.
#102204
A
be
B
being
C
had
D
Was
She is a hardworking student, and all her spare time she has ________ staying in the library.
#99458
A
spent
B
is spent
C
to spend
D
to be spent