Chọn đáp án đúng: 1. The water in this swimming pool .... to cold. A. are feeling B. feel C. feels D. was feeling 2. The articles that John has written ..... difficult to understand. A. has been B. was C. are D. is 3. The clothes in this box .... to my sister. A. belong B. was belonging C. is belonging D. belongs 4. ..... cats as faithful as dogs? A. Be B. Is C. Am D. Are 5. Two thirds of the land ..... already been sold. A. is B. are C. has D. have 6. He is learning ten dollars an hour, which ..... not a small amount of money. A. be B. to be C. is D. are 7. His answers to the questions ..... (change) so far. 8. The English ..... (like) to drink tea. 9. Much progress .... (have) been made in recent weeks. 10. Both of the girls .... (be) pretty, but neither of them .... (be) intelligent.