PROFESSIONAL PEOPLE EXPECT ... WHEN IT IS NECESSARY TO CANCEL AN APPO...

Câu 16: Professional people expect ... when it is necessary to cancel an appointment.

A. that you are calling them B. that you would call them

C. you to call them D. your calling them

Mark the letter A, B, C, or D on your answer sheet to indicate the one underlined word or phrase

that must be changed to be correct.