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【题目】
______ water to grow is well known.
A. That trees need
B. These trees need
C. That tree needs
D. Trees need
【答案】A
【解析】句意：树生长需要水是众所周知的。that trees need water to grow是主语从句，放在句子的开头，这里的引导词that不能省略。
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【题目】
______ water to grow is well known.
A. That trees need
B. These trees need
C. That tree needs
D. Trees need
【答案】A
【解析】句意：树生长需要水是众所周知的。that trees need water to grow是主语从句，放在句子的开头，这里的引导词that不能省略。