12. ——I'll be away on a business trip. Would you mind looking after my cat? ——Not at all.—— A. I've no time B. I'd rather not C. I'd like it D. I'd be happy to 13. The boy wanted to ride his bicycle in the street, but his mother told him——. A. not to B. not to do C. not do it D. do not to 14. Dr Black comes from either Oxford or Cambridge, but I can't remember.—— A. where B. there C. which D. that 15. ——Nancy is not coming tonight. ——But she——! A. promises B. promised C. will promise D. had promised 16. ——the temperature, —— water turns into steam. A. The high; the fast B. Higher; faster C. The more higher; the faster D. The higher; the faster 17. I ——and will never ask such a silly question. A. have never B. never C. have never asked D. never asked 18. ——Do you think it's going to rain over the weekend? ————. A. I don't believe B. I don't believe it C. I believe not so D. I believe not