问题
选择题
_________ water to grow is well-known.
A．That trees need
B．These trees need
C．That tree needs
D．Trees need
答案
答案：A
本句的意思是：树需要水生长是众所周知的。
That trees need water to grow是一个主语从句，放在句子的开头，引导词that不能省略。
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