单选题
4.
In this experiment, they are wakened several times during the night, and asked to report what they ______.
A、
had just been dreaming
B、
are just dreaming
C、
have just been dreaming
D、
had just dreamt
【正确答案】
C
【答案解析】
句中已给出频次状语several times，说明要用完成时态，同时句子的时态定位是现在时they are wakened，显然不能用过去完成时，所以选C。句意为：在这个实验中，他们在夜间被叫醒若干次，并且报告他们的梦境。
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