30. Can you tell me at that time? A. what were they doing B. what they were doing C. what are they doing D. what they are doing 查看更多

 

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Can you tell me ________ at that time?

 A. what were they doing        B. what they were doing

C. what are they doing          D. what they are doing

 

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Can you tell me ______ at that time?
[     ]
A. what were they doing
B. what they were doing
C. what are they doing
D. what they are doing

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Can you tell me ________ at that time ?

A. what were they doing   B. what they were doing

C. what are they doing     D. what they are doing

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】Can you tell me ________ at that time?
A. what were they doing        B. what they were doing

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Can you tell me ________ at that time?

A.what were they doing                           B.what they were doing

C.what are they doing                       D.what they are doing

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