单选题In this experiment, the students’ studies are stopped several times during the listening test and asked to report what they ______ during the pause before answering the questions.A had just been thinking about B have just been thinking aboutC are just

题目
单选题
In this experiment, the students’ studies are stopped several times during the listening test and asked to report what they ______ during the pause before answering the questions.
A

had just been thinking about  

B

have just been thinking about

C

are just thinking about

D

had just thought about


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