问题标题:
Whenandwheretogofortheon-salaryholiday___yet.A.arenotknownB.havenotbeenknownC.isnotbeingknownD.hasnotbeenknown答案是C每一个选项都讲一下谢谢!
问题描述:
Whenandwheretogofortheon-salaryholiday___yet.A.arenotknownB.havenotbeenknownC.isnotbeingknownD.hasnotbeenknown答案是C每一个选项都讲一下谢谢!
阮宝崧回答:
答案:D
whenandwheretogofortheon-salaryholidy短语做这个句子的主语,谓语动词用单数,yet决定这个句子的时态为现在完成时.
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