12.Should we try to ______ every custom or tradition which is in danger of dying out? A. preserve B. act out C. entertain D. open 13.He told me ______ the door open. A. not leave B. not to leave C. to not leave D. not to leaving 14. He suggests that we ________ early tomorrow morning. A. started B. to start C. starting D. should start 15.A skytrain is different ______ an usual tram. A. as B. at C. from D. to III. Find a mistake in the four underlined part of each sentence and correct it. 16.My father asked us not to spending too much time playing computer games. A B C D 17. I suggest to have a separate wastebasket for wastepaper. A B C D 18. My teacher said that we will have a picnic the following month. A B C D 19. She wishes she has enough money to buy a new car now. A B C D 20. Although he doesn’t trust weather forecasts, but he likes watching them. A B C D