题目内容
People _________ rivers for transportation since the beginning of history.
| A．used | B．have used | C．use | D．had used |
B
解析试题分析：句意：自从历史之初人们就用河水来作为交通工具，根据句意和since引导的从句可知用完成时，现在完成时的构成have done的结构。结合语境故选B
考点：考查动词的时态的用法。
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