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皮皮学刷刷变学霸
举一反三
【简答题】填方施工过程中应检查()
【简答题】____________(环境一旦造成破坏), it takes many years for the system to recover.
【单选题】By the time she takes the entrance examination, Louis ______ Spanish for five years.
A.
had been studying
B.
has studied
C.
will have been studying
D.
will study
【单选题】Many people believe that _______ will takes years to develop a car that does not pollute the air.
A.
it
B.
that
C.
there
D.
this
【简答题】_____________(环境一旦遭到破坏)，it takes many years for the system to recover
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