问题
选择题
— I called you at ten, but there was no reply.
—Oh, that was probably when I ________ a shower.
A．am taking
B．took
C．were to take
D．was taking
答案
答案：D
意为：“你打电话来时，我可能正在洗淋浴”。指在过去某个时候正在发生的动作，用过去进行时。
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