The Internet __________ of great value to us during our project.A．was provedB．pr_刷题宝

题干

The Internet __________ of great value to us during our project.

A．was proved

B．proved

C．was proving

D．was being proved

上一题下一题 0.94难度单项选择更新时间:2010-05-14 08:59:27

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