—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
 There’re too many clothes in the shop. I really can’t decide           .
#57190
A
which to buy coat
B
to buy which coat
C
which coat should I buy
D
which coat to buy
Don’t worry! I’ll send you an e-mail              .
#57193
A
as soon as possible
B
as soon as possibly
C
as soon as can
D
as quick as possible
In this school, ______ students work very hard, ______ they are very happy.
#57207
A
although, /
B
although, but
C
/, although
D
but, although
You will fail the English exam ________ you study hard.
#57214
A
however
B
anyway
C
unless
D
but
---_____ have you lived in England?    --- For 3 years.
#57221
A
How long
B
How much
C
How often
D
How many
____ it is rainy today, ____ he still works outside.
#57229
A
Although, but
B
But, although
C
/, although
D
Although, /
We can go hiking next week ____ it rains heavily.
#57235
A
unless
B
if
C
though
D
because
I didn't go there____the bad weather. 
#57238
A
because
B
if
C
but
D
because of
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