----- Nội dung dịch tự động từ ảnh ----- 17. The telephones __________ by Alexander Graham Bell A. is invented B. is inventing C. invented D. was invented
18. Lots of houses __________ by the earthquake A. are destroying B. destroyed C. were destroyed D. is destroyed
19. Gold __________ in California in the 19th century A. was discovered B. has been discovered C. was discover D. they discover
20. The preparation __________ by the time the guest... A. had been finished - arrived B. have finished - arrived C. had finished - were arriving D. have been finished - were arrived
21. The boy __________ by the teacher yesterday. A. punish B. punished C. punishing D. was punished
