问题补充:
--- What did the professor tell you to do?
--- I had to write a report.
A. three-thousand words
B. three thousands word
C. three-thousand-word
D. three-thousand-words
答案:
A. three-thousand words
B. three thousands word
(答案→)C. three-thousand-word
D. three-thousand-words
解析:可联系答.案.网客服索取。