题目内容
— What were you doing when we were playing basketball yesterday afternoon?
— I ______ the classroom.
| A．was cleaning | B．have cleaned |
| C．will clean | D．clean |
A
解析试题分析：句意：昨天下午当我们正在打篮球时，你正在做什么？结合语境可知下文描述的是过去某时正在进行的动作，故用过去进行时态。选A。
考点：考查时态辨析
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