The dog has to/can be fed everyday., New species have to/can be studied in a science lab, Dangerous places mustn’t/have to be entered alone., Headlamps must be/can be worn in dark caves., They can’t be/mustn't be analysed underwater., Boots must be/have to be worn in the mountains., Helmets can be/must be worn..

OW6 Unit7 grammar

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랜덤카드(은)는 개방형 템플릿입니다. 순위표에 올라가는 점수를 산출하지 않습니다.

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