试题题干
Translate the following sentence into Chinese.
It takes time for them to prepare for the great changes that occur in space.
参考答案
试题解析
考点：It takes time for sb. to 某人得花很长时间······；prepare for作准备。
句子结构：It为形式主语，真正的主语是to prepare for···，that引导定语从句修饰changes。