B

1.Member nations have a reason for attending summits to discuss shared goals.

2.His respiratory health has gradually become better since he quit smoking.

3. It is forbidden to litter in public places in Vietnam to keep the environment clean.

 4.During the holiday season, the city looks festive and joyful, decorated with  lights and decorations.

 5.My mom was in charge of resolving the family argument and finding a solution.

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