----- Nội dung dịch tự động từ ảnh ----- Choose the correct verb form among A, B, C or D for each numbered gap to complete the passage. Many changes (31)....... to the world map this century. Boundaries (32) ..... as a result of world wars and foreign invasions, and many former colonies (33)...... their independence. In 1960, for instance, fifteen African countries (34) ..... independent, some of which have changed their names. This tendency to change names when countries became independent (35) ...... since then: Ceylon is now Sri Lanka and the Trucial States (36) ...... the United Arab Emirates. More recently, in what (37).... the Soviet Union, even cities (38)....... by the change, the most notable example (39) ...... Leningrad, which in 1991 (40). back to the pre-Revolutionåry name of St. Petersburg. 31. A. have made B. have been made III. 32. A. have redrawn C. have been redrawn 33. A. have gained 34. A. become 35. A. have continued C. continue 36. A. have become 37. A. was 38. A. have affected C. were affected 39. A. is 40. A. go B. gained B. became B. becoming B. were B. are B. goes C. are made B. has redrawn D. were redrawn C. have been gained C. have become B. has continued D. continues C. to become C. is B. have been affected D. are affected C. is being C. went ***** D. make D. gain D. has become D. has become D. are D. are being D. has gone