EX3: Choose the best answer 8. She wouldn't have given them all that money if we .......... her to. A. wouldn’t advise B. won't advise C. hadn't advised D. didn't advise 9. If the tree hadn't been so high, he .......... it up to take his kite down. A. could have climbed B. climb C. is climbing D. climbed 10. If the wall weren't so high, he .............it up to take his ball down. A. climbed B. could climb C. is climbing D. climb 11. If I .............her phone number, I ............. her last night A. had known/ could have phoned B. knew/ would have phoned C. know/ can phone D. knew/ could phone 12. If he ............. the truth, the police wouldn’t arrest him. A. tells B. told C. had told D. would tell 13. If you press that button what .............? A. would happen B. would have happened C. will happen D. happen 14. She says if she .............that the traffic lights were red she .............. A. had realized/ would stop B. realized/ could have stopped C. has realized/ stopped D. had realized/ would have stopped 15. I am very thin. I think, if I ............. smoking, I might get fat. A. stop B. had stopped C. will stop D. stopped 16. If I ............. that yesterday, I ............. them. A. had discovered/ would inform B. had discovered/ would have informed\ C. had discovered/ could inform D. discovered/ can inform 17. If you ............. to the course regularly, they ............. a certificate last year. A. go/ gave B. go/ give C. had gone/ would have given D. went/ would give 18. I think he is not at home. If he ............. in, he ............. the phone. A. was/ answered B. were/ would answer C. were/ would have answered D. had been/ would have answered 19. If I ............. in London now, I could visit British Museum. A. were B. had been C. have been D. would be 20. If Columbus ............. money from Queen Isabella, he ............. across the Atlantic. A. do not receive/ could not sail B. had not received/ might not have sailed C. did not receive/ might not have sailed D. would not receive/ might not sail giúp mình với các b ưii=(((((((((((((