They/ not answer/phone/ this morning, so/ must/ ou...
Câu hỏi: They/ not answer/phone/ this morning, so/ must/ out/.
A. They hasn't answered the phone this morning so they must have been out.
B. They didn't answer the phone this morning so they must be out.
C. They didn't answer the phone this morning so they must have gone out.
D. They hasn't answered the phone this morning so they must go out.
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2018 môn Tiếng Anh - Chuyên ĐH SPHN lần thứ 2