问题
选择题
The letters for the boss ________ on his desk but he didn't read them until three days later.[ ]
A. were put
B. was put
C. put
D. has put
答案
答案：A
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The letters for the boss ________ on his desk but he didn't read them until three days later.[ ]
A. were put
B. was put
C. put
D. has put
答案：A