2000 câu trắc nghiệm tổng hợp Tiếng Anh 2025 có đáp án (Phần 45)

She could ________ in the garage when we came round, which would explain why she didn’t hear the bell.

460/500

She could ________ in the garage when we came round, which would explain why she didn’t hear the bell.

work

be working

have worked

have been working

Giải thích

Đáp án: D