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【单选题】
We were playing near the lake______ the storm started.A.
while
B.
when
C.
until
D.
before
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反馈参考答案：
举一反三
【简答题】a×6+6×15=______×（______+______）．
【单选题】We had only been driving for an hour when the car ______ petrol. [ ]
A.
was run out of
B.
was run out
C.
ran out of
D.
ran out
【单选题】We had been driving for hours ___________I realized that something was wrong with one of the tyres.
A.
as
B.
when
C.
while
D.
until
【简答题】______÷5=6：______=0.6= 15 () =______：15．
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