________is no doubt that today greenhouse gases are the largest human influenc

题干

________is no doubt that today greenhouse gases are the largest human influence on global climate.

A．It

B．There

C．This

D．That

上一题下一题 0.64难度单项选择更新时间:2014-07-10 07:00:22

小学学科试题库

初中学科试题库

高中学科试题库