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The fact has worried many scientists _____ the earth is becoming warmer and warmer these years. [ ]A

题目简介

The fact has worried many scientists _____ the earth is becoming warmer and warmer these years. [ ]A

题目详情

The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.

[ ]

A. what
B. which
C. that
D. through

题型：单选题难度：中档来源：同步题

答案

C

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