Dr. Jason decided to help his students by______.A.collecting used textbooksB.writing a con

学历类 专四 已帮助 人

Dr. Jason decided to help his students by______.

A.collecting used textbooks

B.writing a concise textbook

C.selling second-hand books

D.making public speeches

请帮忙给出正确答案和分析,谢谢!

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