41. She came home to look ___________her elderly parents. A. after B. from C. with D. of 42. 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 43. 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? 44. Could you do me a favor? - __________ . A. Of course B. No problem C. Certainly D. All correct 45. John studies hard __________ fail his final exam. A. in order B. so as to C. so that D. so as not to 46. 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 47. The children have gone to the park ______________ 3 o’clock. A. at B. after C. since D. before