1. I still can't believe it! My wallet ______last night. ​A. was stolen ​B. was stealing. ​C. stolen​D. stole 2. The current computer problem is__________ by some experts in the country. ​A. studying ​B. being studying ​C. being studied ​D. been studied 3. Something funny__________ in class yesterday. ​A. happened ​B. was happened ​C. happens ​D. is happened 4. The child's arm was swollen because he _________by a bee. ​A. stung​B. had stung ​C. had been stung ​D. had being stung 5. Today, many serious childhood diseases ___________by early immunization. ​A. are preventing ​B. can prevent ​C. prevent ​D. can be prevented 6. I________ with you on that subject. ​A. am agree ​B. am agreed ​C. agreeing ​D. agree 7. Many U. S. automobiles __________in Detroit, Michigan. ​A. manufacture​​B. have manufactured ​ ​C. are manufactured​​D. are manufacturing 8. Let's go ahead and do it now. Nothing_________by waiting. ​A. accomplishes​​B. accomplished ​ ​C. has accomplished ​​D. will be accomplished 9. "When _______?" "In 1928." ​A. penicillin was discovered​B. did penicillin discovered ​C. was penicillin discovered​D. did penicillin discover 10. In recent years, the government has imposed pollution controls on automobile manufacturers. Both domestic and imported automobiles must_________ antipollution devices. ​A. equip with​B. be euipped with ​C. equip by​D. be equipped by