第一题选C.季节月份前 一般用in; 地点:大范围用IN 小的具体的用 AT .强调在内布也可用IN
例如:in Peking/China/...city /country/...
at school /home ; at the park/the butcher's /my mother's /...
at the library 或 in the library 强调点不同.
但地点副词前不加介词:如here there upstairs downstairs outside inside home abroad...
go home go abroad go there come here
He is playing upstairs /downstairs /outside/ inside...
第二题选B.what does your father do = what is your father
第三题选C.how about doing sth..做某事怎样?
about是介词,后面加动词 必须加ING.