Jack wasn’t saying anything，but the teacher smiled at him ________he had done something very clever．
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A
as if
B
in case
C
while
D
though
推荐题目
TV-Turnoff Week, _______ millions of people around the world participate every year, tries to encourage people to turn on life.
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A
in which
B
on which
C
which
D
when
Yuan Longping, known as the “father of hybrid rice”, doesn’t care about money or about ____ people call position.
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A
that
B
such
C
what
D
which
This is the hotel _______last month.
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A
which they stayed
B
at that they stayed
C
where they stayed at
D
where they stayed
Along with the letter was his promise ________ he would visit me this coming Christmas.
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A
which
B
that
C
what
D
whether