题目内容
---It’s said that no one ______ light a cigarette at a gas station.
--- Yes. Safety always comes the first.
A. can B. may C. shall D. must
C
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题目内容
---It’s said that no one ______ light a cigarette at a gas station.
--- Yes. Safety always comes the first.
A. can B. may C. shall D. must
C