题目内容
Police departments uncovered nearly 30 cases ____ more than 30 suspects caught _____ hidden telecommunication equipment to cheat on the exams. A. involved; to use B. to involve; using C. involving; using D. involved; used |
C |
本题考查现在分词的用法。句意为“警方破获了将近30起案件,30多名涉案人员使用隐蔽的通讯设备在考场上作弊时被抓”。 |

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