.—Can you give some advice on what I said just now? —Sorry. My mind.A. is wanderingB. wa

问题补充：

.—Can you give some advice on what I said just now? 

—Sorry. My mind.

A. is wandering

B. was wandering

C. has wandered

D. had wandered

答案：

A. is wandering

(答案→)B. was wandering

C. has wandered

D. had wandered

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