500 bài viết lại câu ôn thi chuyên Tiếng Anh có đáp án cực hay (Phần 4)

It was only when I checked that I noticed the tyre was flat. (DID)

95/110

It was only when I checked that I noticed the tyre was flat. (DID)

0/3000 ký tự
Giải thích

→Only when I checked the tyre did I notice it was flat.