Question

【题目】Keep away from these books.They're ________to teenagers.

A. helpful B. useful

C. successful D. harmful

Answer 1

【答案】D

【解析】解析：句意：远离那些书，他们对青少年有害处。A. helpful有帮助的， B. useful有用的，C. successful成功的，D. harmful有害的。根据Keep away from these books.远离那些书，可推知“书是有害的”，结合选项，故答案选D。