It was April 29, 2010 Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
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A
that
B
when
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since
D
before
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I was about to give up my effort to solve a problem __________ a good idea struck me.
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A
when
B
while
C
until
D
before
Our class will go to the National Park next Sunday ——________ it rains, of course.
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A
when
B
unless
C
for
D
whether
—Did you meet with the famous star?—______ I had come here earlier.
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Only if
B
If only
C
But for
D
As long as