17000 bài tập tách từ đề thi thử môn Tiếng Anh có đáp án (Phần 3) (Part 2)

Are flights with this company often delayed?’ - ‘No, they on schedule. ’

21/500

Are flights with this company often delayed?’ - ‘No, they _____________ on schedule. ’

usually left

have usually left

are usually leaving

usually leave

Giải thích

Chọn D