regular exercise is very important.It’s never a good idea to exercise too close to bedmme. 
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A
If
B
As
C
Although
D
Unless
推荐题目
 There were two boys in the lab,       did the experiment successfully.
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A
the clever of whom
B
the cleverer or whom
C
the clever of them
D
the more clever of them
 Sometimes we are asked _____ the likely result of an action will be.
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A
that we think
B
what do we think
C
what we think
D
that what we think