题目内容
Your trousers ________ dirty. You must have ________ washed.
A. is; it
B. are; it
C. are; them
D. is; them
答案:C
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题目内容
Your trousers ________ dirty. You must have ________ washed.
A. is; it
B. are; it
C. are; them
D. is; them