we were playing basketball on the playground, it began to rain.A．WhileB．
题型：不详难度：来源：
we were playing basketball on the playground, it began to rain.| A．While | B．After | | C．Before | D．Since |
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答案
| A |
解析
试题分析：句意：当我们正在操场上打篮球时，开始下雨了。when,当，强调从句的动作发生时，主句的动作正在发生。while,强调从句的动作在发生的过程中，主句的动作发生了。根据句意，故选A。 |
举一反三
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