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【简答题】
()要想提高经济效益,降低能耗非常重要
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举一反三
【单选题】－Have you seen the film Lost in Thailand? －Oh, no. I ___ my homework all day yesterday.
A.
had done
B.
did
C.
have done
D.
was doing
【单选题】— When did you finish _____ your homework? — I finished it at 9:00 last night. [ ]
A.
do
B.
to do
C.
did
D.
doing
【单选题】He________go to bed_______he finished his homework.
A.
doesn’t; until
B.
doesn’t; and
C.
didn’t; until
D.
didn’t; for
【单选题】The students _____ their homework when the teacher came into the classroom. [ ]
A.
do
B.
will do
C.
did
D.
were doing
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