11. He tells everyone that he is a foreign tourist, but as a ____ of fact he is a spy. A. thing B. matter C. factor D. case 12. It’s been reported that the dangerous criminal is still at ____. A. space B. width C. freedom D. large 13. The Queen has been invited to ____ a visit to our country next year. A. pay B. enter C. arrive D. spend 14. Flats are much cheaper here in ___ with those in the city centre. A. similarity B. difference C. comparison D. confrontation↑ 15. For ____ of wasting the money, I preferred to put it in my bank account. A. risk B. fear C. worry D. danger 16. You don’t ____ much importance to quality, which is a big mistake. A. tie B. join C. attach D. connect 17. Tom has changed for worse. He ____ be a good boy when I knew him. A. could B. might C. should D. used to 18. Could you show us ____ photos from your expedition, Huy? A. others B. another C. some other D. some others 19. Fortunately, ____ the guests were injured when the fire broke out at the hotel. A. none B. no one C. none of D. no one of 20. Everyone should take part in the charity collection, shouldn’t ____? A. it B. they C. he D. she Giải thích giúp mình với nhé Cảm ơn nhiều ạ :(((