单项选择题
You (will not able to) pass the examination (unless) you (work harder) than you (do) now.
A.will not able to
B.unless
C.work harder
D.do
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单项选择题
The waste, (according to) the people there, (has already) found (their) way (into) the drinking water.
A.according to
B.has already
C.their
D.into
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单项选择题
(Only when) it (started) to rain (he noticed) that he (had left) his raincoat somewhere.
A.Only when
B.started
C.he noticed
D.had left
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