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We don’t know Jack        Bruce.
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A
and
B
or
C
about
D
of
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He had to retire(退休)early         poor health.
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as a result
B
because
C
so
D
because of
—Does your grandpa often walk the dog after supper? — Yes, _________ bad weather stops him.
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unless
B
because
C
though
D
since
I have a computer,________I don’t play computer games on it.
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also
B
only
C
but
D
and
“_____are you going?” “I’m going to the library.”
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Who
B
When
C
What
D
Where
We never know we will succeed ________ we actually try.
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until
B
when
C
unless
D
though