问题

This city plans to ________ all high-polluting factories by the end of 2018 so as to improve its air quality.

A:purchase
B:promote
C:remove
D:replace;

正确答案是：

同类题型

Why don’t we start a school magazine on line —________

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Martin looks so well. We’ve never seen him ______ sowell before.

When the boy walks _______ the table, he often knocks the things _______ it.