My sister _________ a movie when she ________ asleep on her flight home. A. was watching/ fell B. was watching/ was falling C. watched/ fell D. is watching/ falls

Hướng dẫn giải:

Đáp án đúng: A

Kiến thức: Chia thì động từ

Cấu trúc câu với “when” (khi): S + was/were + V-ing + when + S + V2/ed.

My sister was watching a movie when she fell asleep on her flight home.

Dịch nghĩa: Em gái tôi đang xem phim thì ngủ quên trên chuyến bay về nhà.