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—Jim,comeout.Let’sgotoplayfootball.—Sorry.I’m

練習題1.06W

問題詳情:

—Jim,comeout.Let’sgotoplayfootball.—Sorry.I’m

—Jim, come out. Let’s go to play football. —Sorry. I’m _______ a math problem.

 A. working out   B. working on   C. working for    D. working at

【回答】

B

知識點:動詞和動詞短語

題型:選擇題