单项选择题

A decision must be () immediately () stop the factory () waste water with out being treated.

A. made, to, pouring
B. made, 不填, to pour
C. done, 不填, pouring
D. had , to, to pour

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Some people try to get it by making money. The underlined it’, means ()

A. happiness
B. the preceding sentence
C. money
D. such things as house, farms and cars
单项选择题
It was last night ()I see the comet.

A. the time
B. when
C. that
D. which
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