—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
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____________ a big party in our school in two weeks.
#57817
A
It is
B
It will be
C
There was
D
There is going to be
--- What is our head teacher like, do you know? --Oh, he is very kind, ________ he looks very serious.
#55617
A
because
B
though
C
if
D
when