ai giúp mình với nhé Multiple choice: 16. If I didn't work for an accounting firm, I __________in a bank now. A. work B. will work C. have worked D. would work 17. The death rate would decrease if hygienic conditions __________improved. A. was B. is C. were D. had been 18. The education in Japan __________if the basic principles of education had not been taken into consideration. A. would go down B. would have gone down C. went down D. had gone down 19. If there __________, the rice fields could have been more productive. A. had been enough water B. were enough water C. would be enough water D. are enough water 20. The patient will not recover unless he __________ an operation. A. had undergone B. would undergo C. undergoes D. was undergoing 21. If she __________ him, she would be very happy. A. would meet B. will meet C. met D. should meet 22. If he __________ a thorough knowledge of English, he could have applied for this post. A. had had B. had C. has D. has had 23. If I had enough money, I__________ abroad to improve my English. A. will go B. would go C. went D. should have go to 24. The bench would collapse if they __________on it. A. stood B. stand C. standing D. stands 25. If it __________convenient, let's go out for a drink tonight, A. be B. is C. was D. were