There are several chemical factories _______ waste water into the river.[ ]A. pouring B. pour C. to

题目简介

There are several chemical factories _______ waste water into the river.[ ]A. pouring B. pour C. to

题目详情

There are several chemical factories _______ waste water into the river.

[     ]

A. pouring
B. pour
C. to pour
题型:单选题难度:中档来源:期末题

答案

A

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