5. The bamboo used to make conical hats must be split into very thin strings and then put into water _________ they can avoid tearing and any breakage. A. because B. therefore C. although D. so that 6. Children in the poor villages are allowed to go to school without _______ money. A. paid B. to paying C. to pay D. paying 7. John: Thank you for your lovely present. - Sam: “_______” A. Not at all. B. Come on. C. I’m pleased you like it. D. Go ahead. 8. “Do you _________ your new classmate, or do you two argue?” A. look forward to B. get on with C. keep up with D. face up to 9. Aircraft flying in _________ arcs create microgravity for tests and simulations that last 20-25 seconds. A. straight B. circular C. parabolic D. oval 10. Mathematics and Literature are two of_________ subjects in high school examinations. A. compulsory B. adding C. additional D. optional 11. _________ is the act of cutting down or burning the trees in an area. A. Forestation B. Afforestation C. Reforestation D. Deforestation 12. Tom: Can I have a look at that pullover, please?” Sue: “______________” A. It’s much cheaper. B. Which one? This one? C. Can I help you? D. Sorry, it is out of stock. 13. “It sounds like the problem is not your appearance but the_________ you see yourself”, said the advice columnist. A. way B. route C. path D. distance 14. My parents are very proud _________ my result. A. at B. with C. from D. of 15. The flat_________ he lives in is not far from his office. A. when B. what C. which D. where CÁC BẠN LÀM VÀ GIẢI CHI TIẾT GIÚP MÌNH VS Ạ