Giúp mình với!! 8. ..................... is your national flag? Red and yellow. a. What b. Which of color c. What color d. Which 9. . ...................do you take a holiday? ~ Once a year. a. When b. How long c. What time d. How often 10. . ...............is Greg like'? ~ He's tall and thin with brown hair. a. What b. How c. Who d. Whom 11. .................... did the. Second World War end? ~ in 1945. A. Where B. When C. What time D. How long. 12......................is a half of football? ~ forty-five minutes. A. What time B. How often C. How long D. When 13..................... of holiday are you interested in?"~ package holiday. A. Which B. What C. Which kind D. What kind 14....................... hand do you write with? ~ My right hand. A. Which B. What C. Whose D. What sort of 15..................... did the package come from? ~ London. A. When B. Where C. Which D. Who