15.-Jack,let's go swimming.
-Sorry,I'm busy right now.I _____ for the exam tomorrow.( 。
A.prepareB.have preparedC.am preparingD.will prepare

分析 --Jack,我們一起去游泳吧.
--抱歉,我現(xiàn)在很忙.我在準(zhǔn)備明天的考試.

解答 答案:C.
考查動詞的時態(tài).根據(jù)前面的時間狀語right now可知,描述的說話當(dāng)時的動作,表示正在準(zhǔn)備明天的考試;故選用現(xiàn)在進行時;所以選C.A為一般現(xiàn)在時,表示習(xí)慣性或經(jīng)常性的動作,B項為現(xiàn)在完成時,表示過去的動作對現(xiàn)在造成的影響和結(jié)果;D項為一般將來時,表示將來要發(fā)生的動作.

點評 對于動詞時態(tài)的考查要搞明白每個時態(tài)的具體用法,尤其是要熟悉一些時態(tài)中的典型時間狀語.

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