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
Her mother gave her that beautiful necklace, which had been ______ from her grandma.
A．handed in
B．handed over
C．handed out
D．handed down
单项选择题
They fulfilled the plan earlier than they ______ .
A．have expected
B．were expected
C．were expecting
D．had expected.
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