Choose the incorrect part in the following sentences (A or B, C, D) and correct them. (1,5 pts)
Trả lời cho các câu 1, 2, 3 dưới đây:
Each of the following sentences contains one error. Underline and correct it. (10 pts)
Trả lời cho các câu 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 dưới đây: