◎ 题干
— How long do you think it will be _____ China sends a manned spaceship to the moon?
— Perhaps two or three years.

A. when
B. until
C. that
D. before
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“— How long do you think it will be _____ China sends a manned spaceship to the moon? — Perhaps two or three years. [ ]A. when B. until C. that D. before …”主要考查了你对  【从属连词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。