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The letters for the boss___________ on his desk but he didn’

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The letters for the boss___________ on his desk but he didn’t read them until 3 days later.
A.were put B.was put C.put D.has put
The letters for the boss___________ on his desk but he didn’
答案A 考查时态语态.letter“信件”和put“放”之间是被动的关系,所以排除C和D,然后因为letters 是复数,所以选择A选项.句意:给老板的那些信放在他的办公桌上,但是直到三天以后他才 读了那些信.查看原帖