28.--You haven't said a word about the design, Michael.What's your idea? --I'm sorry I about something else. A.am thinking B.thought C.was thinking D.had thought 查看更多

 

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--You haven't said a word about the design, Michael.What's your idea?

--I'm sorry I ___________ about something else.

A.am thinking               B.thought               C.was thinking         D.had thought

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