Question

【题目】Nowadays all passengers ______ go through safety check before take a train.

A. can B. may C. must D. will

Answer 1

【答案】C

【解析】句意：现在，所有的乘客在上火车之前都必须过安检。A. can能；B. may可以；C. must必须；D. will将要。结合现在的实际情况，可知是必须。故选C。