Choose the best option (A,B,C or D) to complete each sentence: I find Peter is not communicative. He's rather........in public

Choose the best option (A,B,C or D) to complete each sentence
1. I find Peter is not communicative. He's rather........... in public.
A. kind             B. reserved              C. sociable               D. humorous
2. I know you worked really......... this semester.
A. hardly           B.fast        C.badly             D. hard
3. The air is heavily........... with traffic fumes.
A. polluted              B. unpolluted         C. pollution               D. pollutant