There is a natural phenomenon scientists call the greenhouse effect.A．thatB．wh_刷题宝

题干

There is a natural phenomenon scientists call the greenhouse effect.

A．that

B．what

C．for which

D．who

上一题下一题 0.64难度单项选择更新时间:2017-02-07 04:23:47

答案(点此获取答案解析）

小学学科试题库

初中学科试题库

高中学科试题库