Mai usually helps her classmates with their studi...

Câu hỏi:  Mai usually helps her classmates with their studies. Her classmates appreciate her.

A Mai usually helps her classmates with their studies, so they appreciate her.

B Mai usually helps her classmates with their studies, but they appreciate her.

C Mai usually helps her classmates with their studies, for they appreciate her.

D Mai usually helps her classmates with their studies, or they appreciate her.