A waitress served us. She was v...

Câu hỏi: A waitress served us. She was very impolite and impatient.

A. A waitress that served us was very impolite and impatient .

B. A waitress, which served us, was very impolite and impatient.

C. A waitress, that served us, was very impolite and impatient.

D. A waitress, whom served us, was very impolite and impatient.