My purse at the station while I for the train. A. must have been stolen/was waiting B. should have stolen/had been waiting C. will be stolen/am waiting D. had to steal/would be waiting

My purse at the station while I for the train.

A. must have been stolen/was waiting

B. should have stolen/had been waiting

C. will be stolen/am waiting

D. had to steal/would be waiting

Giải thích:

Dùng “must have done sth” để diễn tả phỏng đoán trong quá khứ.

Dùng thì quá khứ tiếp diễn dể diễn tả hành động đang xảy ra tại 1 thời điểm trong quá khứ.

S +was/were + V-ing