—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
—Could we go and watch the football game? —No, ______ you have the tickets.
#57302
A
if
B
unless
C
because
D
since
—The classroom is ____ clean ____ it was yesterday.— Sorry, I forget to clean it.
#56798
A
as; as
B
so; as
C
not so; as
D
more; than
You should go over your test paper _____ you hand it in.
#56787
A
before
B
though
C
because
D
as soon as