---where’s Mom?

-----She’s in the kitchen. She _____the housework all morning

A.is doing B.was doing

C. did D.has been doing

 

D

【解析】

試題分析： 考查動詞的時態(tài)。句意：媽媽在哪？她在廚房里。她今早上一直在做家務。根據(jù) all morning表示一直做某事，故選D項。

考點 : 考查動詞的時態(tài)

 

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