16.Choose the best answer: They use milk for making butter and cheese. A. Milk were used for making butter and cheese. B. Milk are used for making butter and cheese. C. Milk was used for making butter and cheese. D. Milk is used for making butter and cheese. (0.5 Points) A B C D 17.She has taught English here ………………………… 10 years. A. in B. since C. at D. for (0.5 Points) A B C D

16. Cách làm:
- Đọc câu: They use milk for making butter and cheese.
- Xác định đây là câu chia ở thì hiện tại đơn.
- Chọn đáp án phù hợp với thì hiện tại đơn: D. Milk is used for making butter and cheese.

Câu trả lời: D. Milk is used for making butter and cheese.

17. Cách làm:
- Đọc câu: She has taught English here ………………………… 10 years.
- Xác định đây là câu sử dụng thì hoàn thành hiện tại với "for".
- Chọn đáp án phù hợp với "for": D. for

Câu trả lời: D. for

D is the correct answer because 'for' is used to indicate the duration of time in this context. The sentence should read 'She has taught English here for 10 years.'

D. for

D is the correct answer because the sentence is in the present tense and 'milk' is a singular noun, so 'is' is the correct verb form to use.

D. Milk is used for making butter and cheese.