_________ water to grow is well-known.
A. That trees need B. These trees need
C. That tree needs D. Trees need
_________ water to grow is well-known.
A. That trees need B. These trees need
C. That tree needs D. Trees need
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。