— Why weren't you at the meeting?

　　— I ________ for a long distance call from my sister in America.

— Why weren't you at the meeting?

　　　　— I ________ for a long distance call from my sister in America.

　　A. was waited　　　　　　　　　　B. was waiting

　　C. has waited　　　　　　　　　　 D. have been waiting

— Why weren't you at the meeting?
　　— I ________ for a long distance call from my sister in America.

— Why weren't you at school yesterday morning, Li Lei?  — ________, sir.

23．- Why weren't you at the meeting?

　　- I ________ for a long distance call from my sister in America.