题目内容
It’s good _____ old people to cross the road.
| A．help | B．helps |
| C．to help | D．helping |
C
解析试题分析：句意：帮助老人横穿公路是好的。这是固定句型，其中it作的是形式主语，后面要用不定式做真正主语，所以选C。
考点：考查固定句型
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