IV. Choose the best option to complete the following sentence. 11. Do you think learning Chinese is ______ learning Vietnamese? A. more B. similar C. different D. as difficult as 12. How many years are there in a millennium? _________ years. A. 10 B. 100 C. 1000 D. 10 000 13. There are lots of _________ in vegetables. A. vitamins B. diets C. players D. muscles 14. How ______ calories should we eat per day? A. high B. many C. fast D. often 15. Mozart ________ compose music when he was five. A. can B. can’t C. could D. couldn’t 16. My mom is _______ me. A. more tall B. tall than C. the tallest D. taller than 17. Look for a lake if you want to ______ some drinking water. A. avoid B. find C. pick D. stand 18. If she _________ hard, she won’t win the survival competition. A. works B. will work C. doesn’t work D. work 19. You _________ be quiet in classroom. It’s a rule. A. must B. mustn’t C. should D. shouldn’t 20. Don’t ______ strange fruit. A. climb B. pick C. use D. build