11. If you ______ told us about the bad service, we would have eaten there. A. hadn’t B. don’t C. didn’t D. wouldn’t have 12. It's a difficult question. I wish _____________ the answer. A. knowed B. knows C. knew D. had known 13) If there _________a row, I’m going to keep out of it. A. will be B. is C. were D. had been 14) If I ________ you, I’d call and apologize. A. am B. were C. would be D. was 15) I wish you__________stop interrupting me whenever I speak A. will B. would C. could D. might 16) If that hat costs much, I_____ a small one. A. would have bought B. will buy C. bought D. would buy 17) If you_____ more carefully, you wouldn’t have had so many accidents. A. drive B. drove C. had driven D. driven 18) If I_____ that mistake again, my teacher will get angry with me. A. make B. makes C. made D. had made 19) It was a stupid thing to say. I wish I___________ it. A. didn’t say B. haven’t said C. hadn’t said D. said 20) If he_____ to London yesterday, _____ his old friend. A. went/would meet B. go/would meet C. had gone / would have met D. went / would have met