----- Nội dung ảnh ----- 17. - "Here’s my phone number". - "Thanks. I’ll give you a call if I __________ some help tomorrow". A. will need B. need C. would need D. needed
18. The patient will not recover unless he __________ an operation. A. had undergone B. would undergo C. undergoes D. was undergoing
19. If it __________ convenient, let’s go out for dinner tonight. A. be B. is C. was D. were
