Question

It’s hard to imagine_____it would be like living on Mars.

A．that

B．how

C．where

D．what

Answer 1

D

D【命题立意】考查宾语从句。
【解题思路】分析句子成分可知，此句为宾语从句，且从句中缺少宾语，所以用关系代词what引导。故答案选D。句意为：很难想象，生活在火星上会是什么样子。