Question

【题目】The fact has worried many scientists_______ the earth is becoming warmer and warmer these days.

A. what B. which C. when D. That

Answer 1

【答案】D

【解析】

试题分析：考查关系词。句意：全球变暖的事实是很多科学家后很担忧。同位语从句，That引导的从句是the fact的同位语，故选D项。