Bộ 10 đề ôn thi học sinh giỏi Tiếng anh lớp 9 có đáp án (Đề 5)

Unless we polish metals frequently, they rust or tarnish when exposure to air.

46/105

Part 3:Questions from 46 to 50. (1 points - 0.2/ each)

Each of the following sentences has an error. Find the errors and correct them.

Unless we polish metals frequently, they rust or tarnish when exposure to air.

0/3000 ký tự
Giải thích

Unless we polish metals frequently, they rust or tarnish when exposure to air. expose