-- Turn off the TV, Jack. _______ your h...

-- Turn off the TV, Jack. _______ your homework now?

-- Mum, just ten more minutes, please.

A. Will you be doing B. Should you be doing

C. Shouldn't you be doing D. Couldn’t you be doing

C 【解析】考查含情态动词的进行时态。句意：——把电视关掉，杰克。你现在不应该做作业吗?——妈妈，请再给我十分钟。此处表示目前应该在做某事，should“应该”，这里用含情态动词的进行时态，故选C。

考点分析：

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