6. Whenever problems come up, we discuss them frankly and find solution quickly. A. happen B. encounter C. arrive D. clean 7. – “Where is Dung?” – “He is ___ work. He is busy ___ his monthly report A. on/for B. in/about C. to/through D. at/with 8. When Thao ___ last night, I ___ my favorite show on television. A. was calling/watched B. called/have watched C. called/was watching D. had called/watched 9. All of the students are ___ to pass the entrance examination in order to attend the university. A. obsessed B. obliged C. obtained D. observed 10. Most adjectives can be used to ___ a noun. A. precede B. advance C. occur D. stand 11. He ___ for that company for five months when it went bankrupt. A. has been working B. has worked C. had been working D. was working ai nhanh nhất mình cho ctlhn nha