5. She came home to look ___________her elderly parents. A. after B. from C. with D. of 6. Vietnamese is a language he first learnt to speak as a child. It is his______ A. language B. the first C. second languge D. mother tongue 7. May I help you? _____________ A. What can I do for you? B. I’m afraid I’m busy now. C. Yes. That’s very kind of you. D. How can I help? 8. Could you do me a favor? - __________ . A. Of course B. No problem C. Certainly D. All correct 9. John studies hard __________ fail his final exam. A. in order B. so as to C. so that D. so as not to 10. He __________ football a lot but he doesn’t play it anymore. A. was playing B. used to play C. did used to play D. use to play