The letters for the boss on his desk but he didn’t read them until 3 days later.A. were pu

问题补充：

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

答案：

(答案→)A. were put

B. was put

C. put

D. has put

解析：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。