With the rapid growth of Cyberspace everyone should be encouraged to use Internet as to

问题补充：

With the rapid growth of Cyberspace, everyone should be encouraged to use Internet as tool, making it a trend to study in virtual schools in the future.

A. 不填；a

B. 不填; the

C. the; the

D. the; a

答案：

A. 不填；a

B. 不填; the

(答案→)C. the; the

D. the; a

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