giúp mình nốt mấy câu này nha 6. These boxes are _______. A. too heavy carrying B. too heavy to carry C. so heavy to carry D. heavy to carry 7. The president is deeply concerned _______ this issue. A. about B. to C. in D. on 8. There is a big difference _______ British and German schools. A. between B. from C. with D. of 9. Martina’s mother has been her coach_______ many years. A. since B. for C. as D. when 10. Americans often say “Thank you” when you help them _______ something. A. do B. doing C. to do D. A&C are correct 11. Is your English _______ better? A. get B. got C. getting D. geting 12. _______ is a longtime when there is not enough rain. A. Storm B. Drought C. Typhoon D. Flood 13. That child is getting_______ every day. A. big B. bigger C. biggest D. biger 14. Mary and I are looking forward _______ you. A. of seeing B. for seeing C. to seeing D. to see 15. It has been the_______ day in London for 35 years. A. hoter B. hotter C. hotest D. hottest 16. At school, pupils are taught in order to have good ________. A. health b. pride C. satisfaction D. behavior