CHỌN CÂU ĐÚNG VÀ TRẢ LỜI TẠI SAO CHỌN CÂU ĐÓ (ĐẶC ĐIỂM ĐỂ BẠN CHỌN LÀ GÌ? GIẢI THÍCH ĐẦY ĐỦ RA) 15. If it ........ convenient, let's go out for a drink tonight. a. be b.was c. were d.is 16. If you .......time, please write to me. a. have b. have had c. had d. has 17. You should work harder for the coming terminal examination. A. had better B. would rather C. needn't D. mustn't 18. She suggested that he......his situation carefully. A. should consider B. considers C. is considering D. has to consider 19. You .......Mark. You know it's a secret. A. should tell B. shouldn't tell C. couldn't tell D. might tell 20. You have been coughing a lot lately. You ..........smoke so much. A. shouldn't B. can't C. should D. can 21. You look so tired. You ........... go to bed early. A. will B. must C. should D. would 22. Walking home alone is not a good idea. => You...... A. can't walk home alone B.mustn't walk home alone C.don't have to walk home alone D.shouldn't walk home alone