một người đi từ A đến B với vận tốc 25km/h. Lúc về người đó đi đường khác dài hơn quãng đg lúc đi là 10km nhưng tăng vận tốc thêm 5km/h so với lúc đi nên tgian về ít hơn tgian đi là 20p. Tính độ dài quãng đg AB.

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PAST SIMPLE TENSE + PRESENT PERFECT TENSE (1) Exercise 1: Choose the suitable –ed ending for the following words. (Chọn đuôi ed phù hợp) 1. stop A. stopped B. stoped C. stopt 2. dance A. dancet B. danced C. danceed 3. clap A. claped B. clapd C. clapped 4. skip A. skipped B. skipt C. skiped 5. fry A. fryed B. fryd C. fried 6. pat A. pated B. patted C. pated 7. play A. plaied B. played C. playd 8. listen A. listened B. listenned C. listend 9. chat A. chated B. chatted C. chatd 10. tidy A. tidied B. tidyed C. tided 11. try A. tryed B. tried C. tryied 12. dry A. dryed B. dryied C. dried 13. stay A. staied B. stayed C. stayied 14. study A. studied B. studied C. studyd 15. cry A. cryed B. cryied C. cried 16. look A. looked B. lookked C. lookt 17. walk A. walked B. walkked C. walkt 18. watch A. watchhed B. watchyed C. watched 19. paint A. painted B. paintted C. paintied 20. learn A. learned B. learnned C. learnied Exercise 2: Choose the correct the past form of the following words (chọn dạng quá khứ) 21. am A. was B. were C. been 22. is A. was B. were C. been 23. are A. was B. were C. been 24. do A. did B. doed C. done 25. go A. gone B. went C. goed 26. eat A. ate B. eated C. eaten 27. have A. haved B. had C. having 28. give A. gived B. given C. gave 29. sing A. singed B. sang C. sung 30. drink A. drinked B. drank C. drunk 31. swim A. simming B. swum C. swam 32. draw A. drew B. drawed C. drawn 33. ride A. rided B. ridden C. rode 34. write A. wrote B. writed C. written 35. drive A. drove B. driven C. driving Exercise 3: Choose the correct the past participle form of the following words (chọn dạng quá khứ phân từ - phân từ 2) 36. am A. was B. were C. been 37. is A. was B. were C. been 38. are A. was B. were C. been 39. do A. did B. doed C. done 40. go A. gone B. went C. goed 41. eat A. ate B. eated C. eaten 42. have A. haved B. had C. having 43. give A. gived B. given C. gave 44. sing A. singed B. sang C. sung 45. drink A. drinked B. drank C. drunk 46. swim A. simming B. swum C. swam 47. draw A. drew B. drawed C. drawn 48. ride A. rided B. ridden C. rode 49. write A. wrote B. writed C. written 50. drive A. drove B. driven C. driving