It will take a long time for the effective use of natural resources _________.A_刷题宝

题干

It will take a long time for the effective use of natural resources _________.

A．to be made

B．to make

C．being made

D．making

上一题下一题 0.64难度单项选择更新时间:2013-12-10 09:06:21

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