— I'm sure our surroundings will become better. — It is still a problem _____ we can control th

题目简介

— I'm sure our surroundings will become better. — It is still a problem _____ we can control th

题目详情

— I'm sure our surroundings will become better.
— It is still a problem _____ we can control the pollution.
[     ]
A. that
B. whether
C. if
D. why
题型:单选题难度:中档来源:云南省模拟题

答案

B

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