Hãy giải thích 17. How_____________ going to the cinema? A. at B. in C. on D. about 18. If I_____________ hard, I will get good marks. A. will study B. study C. am studying D. studied 19. How can _____________ help the poor in this town? A. governments B. a government C. the government D. government 20. She _____________ it difficult to understand their culture. A. thinks B. learn C. finds D. realizes 21. A: Do you mind if I _____________a phone call? B: No, of course not. The phone's in the living room. A. answer B. send C. take D. make 22. After speaking on the phone, we knew we will have to see one another _____________. A. hand-in-hand B. face-to-face C. head-to-toe D. toe-to-toe