_____ in the library regulations that any book borrowed be returned by due time, or the borrower will be fined．
#78012
A
What is required
B
It is required
C
As is required
D
Which is required
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Our school basketball match will be held from October 12th to 16th, during time as many as 30 teams will compete for the championship.
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which
B
whose
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when
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I wish to thank Professor Smith, without ______ help I would never have got this far.
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who
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whose
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whom
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A bank is the place ____they lend you an umbrella in fair weather and ask for it back when it begins to rain .
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when
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that
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where
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It's said that ________ gains from house sales should pay the individual income tax.
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who
B
whose
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which
D
whoever