500+ câu trắc nghiệm tổng hợp Chia động từ Tiếng Anh có đáp án (Phần 3)

The phone________ constantly since Jack won the first prize this morning.

7/18

The phone________ constantly since Jack won the first prize this morning.

Has been ringing

Rang

Had rung

Had been ringing

Giải thích

Chọn đáp án A