Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 8)

We need to keep an eye ………………..the timetable to make sure that production doesn’t slide.

46/96

We need to keep an eye  ………………..the timetable to make sure that production doesn’t slide.

0/3000 ký tự
Giải thích

We need to keep an eye on the timetable to make sure that production doesn’t slide.