My secretary was supposed to be here at 7 o’clock,...

Câu hỏi: My secretary was supposed to be here at 7 o’clock, but she’s late.

A. My secretary arrived at 8 o’clock.

B. My secretary arrived at 7 o’clock.

C. My secretary should have arrived at 7 o’clock, but she didn’t.

D. My secretary arrived too late to see her chief.