问题补充:
It took a long time for the effective use of natural gas.
A. to be made
B. to make
C. being made
D. making
答案:
(答案→)A. to be made
B. to make
C. being made
D. making
解析:可联系答.案.网客服索取。
时间:2020-12-28 21:58:57
It took a long time for the effective use of natural gas.
A. to be made
B. to make
C. being made
D. making
(答案→)A. to be made
B. to make
C. being made
D. making
解析:可联系答.案.网客服索取。
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