单项选择题

Information technology is taught in most schools，______ we have entered the information society.

A. so
B. while
C. still
D. for
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单项选择题
The ______ paragraphs want rewriting．
A．one fifth
B．first one
C．first four
D．two-thirds
单项选择题
A library with five thousand books ______ to the nation as a gift.
A. is offered
B. has offered
C. are offered
D. have offered
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