(2011·四川)As is reported，it is 100 years ________ Qinghua University was founded.
#30451
A
when
B
before
C
after
D
since
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___I saw him, his humor impressed me.
#30523
A
The first time
B
At first
C
It was the first time
D
For the first time
Paul had to write a history paper, _____ he couldn’t find time to do it.
#33195
A
but
B
so
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because
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if
Just a few minutes every day, _______ you could have shining floors and furniture with this new cleaner.
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A
but
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and
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or
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so
Colin was about to get off the camel ________ a child ran towards him.
#31552
A
while
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when
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as
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since
________ several times，but he still doesn't know how to do it correctly.
#30467
A
Although I've taught him
B
I've taught him
C
Having been taught
D
Having taught