单项选择题

Electronic computer has ______ greatly social economy and life.

A．transferred
B．transformed
C．transported
D．translated

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单项选择题

They fulfilled the plan earlier than they ______ .

A．have expected
B．were expected
C．were expecting
D．had expected.

单项选择题

There are two rooms on the first floor, ______ is used as a guest room.

A．a smaller of which
B．a smaller of them
C．the smaller of which
D．the smaller of them

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