题目内容
Scientists are working hard to make _______ possible for people to live on Mars in the future.
A. it B. that C. this D. one
【答案】
A
【解析】
试题分析:句意:科学家们正在努力工作,使将来人们在火星上生活成为可能。考查句型:make it adj to do sth,故选A。
考点: 考查代词的用法。
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