—What’s the matter with you? You look so worried.-- I don’t know ___________ the problem.
#57173
A
what to solve
B
how to solve
C
to solve what
D
how can I
推荐题目
—Excuse me. How can I get to the library?—walk along this street_______ you see the traffic lights. You will find it on your left.
#56795
A
before
B
after
C
until
D
when
---How was your climb up Mount Tai?---I didn’t believe I could do it I got to the top．
#55282
A
until
B
unless
C
after
D
when
_______ Mary ______ John has been to China before, but they know a lot about it
#57612
A
Either, or
B
Both, and
C
Neither, nor
D
Not only, but also