— The woman biologist stayed in Africa studying wild animals for 13 years before she returned. — Oh, dear ! She ______ a lot of difficulties !
#90563
A
may go through
B
might go through
C
ought to have gone through
D
must have gone through
推荐题目
Cars play an important role in modern life, but they_______also cause many problems like air pollution．
#89014
A
should
B
can
C
must
D
Will
Had it not been for the haze（霾）weather phenomenon, there fewer car accidents in Beijing then．
#86816
A
would have been
B
were
C
may be
D
would be
The people from all over the world demand that reforms______.
#88091
A
have been done
B
be done
C
are done
D
might be done.
A foreign language like English is difficult to learn, so you ____________ work too hard.
#88307
A
can’t
B
must
C
shouldn’t
D
ought to
— Catherine, I have cleaned the room for you. — Thanks. You ______ it. I could manage it myself.
#90498
A
needn’t do
B
needn’t have done
C
mustn’t do
D
shouldn’t have done