tìm số có 4 chữ số mà khi viết các số đó theo thứ tự ngược lại thì số ấy giảm đi 9 lần . Giúp mình với ạ, mìn cho 1ctlhn

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EXERCISE 1: Choose the most correct answer: 1. I wish my father __________ here now.             A. were.                   B. was.         C. is.                         D. be. 2. The teacher wishes you __________ more than you __________.                  A. work / talk.          B. worked / talked. C. works / talks. D. A and B. 3. I wish I __________ you yesterday.             A. have helped.        B. has helped.                              C. had helped.                              D. helped. 4. I wish you __________ more slowly.                 A. drive.                   B. drove.         C. drives.                 D. driven. 5. I wish I __________ in a big city.                   A didn't live.            B. doesn't live C. don't live.            D. did live. 6. I wish tomorrow a __________ workday.              A. wasn't.                 B. are.         C. weren't.                D. is.   7. I wish I __________ to him so impolitely yesterday.                A. hadn't speak.       B hadn't spoke.                               C. hadn't spoken.                             D. had go. 8. I wish the baby __________ crying.                  A. stop.                     B stopped.         C. stops.                   D. stopping. 9. I wish I __________ the lesson.                   A. have understand.         B. had understand.           C. had understood.          D. understand.         10. I wish my friend __________ his exams.            A. passed.                B. had passed.                              C. have passed.                              D. has passed. 11. I wish I __________ speak Spinush.               A. should.                B. could.         C. can.                      D. will. 12. My sister wishes she __________ to play the piano when she was young.         A. learnt.                          B. would learn.                C. had learnt.                   D. would have learnt.        13. I wish someone __________ to helf me with that word tomorrow.         A. offer.                   B. offered.         C. would offer.        D. had offered. 14. I wish I __________ there for my holiday year. I didn't enjoy it.         A. didn't go.             B. hadn't gone.                                 C. wouldn't go.                     D. would rather go. 15. He wishes he __________ the examination last month.           A. didn't fail.                    B. hadn't failed.               C. weren't failing.            D. couldn't have failed. 16. I wish he __________ to me more often.          A. writes.                 B. wrote.         C. have written.       D. is writing.  17. I wish he __________ more time now to help you with your lesson         A. have.                    B. had.        C. would have.        D. had had. 18. I wish I __________ Psychology when I was a college student.         A. had studied.         B. would study.                                C. studied.        D. study. 19. If only I __________ play the guitar as well as you.         A. would.                 B. should.        C. could.                  D. might. 20. I wish I __________ my letter of application earlier. A. wrote.      B. had written.        C. could write.  D. should wr