UNIT 5: NATURAL WONDERS OF VIET NAM A. dirty B. small 29. This tree is very old. A. tall B. young C. fresh C. heavy Mark A, B, C, or D to indicate the word or phrase that is OPPOSTIE 30. It's a man-made lake. A. fake B. natural 31. This house is more expensive than my house. A. easy Choose the war B. noisy GRADE 6-GLOBAL D. lovely D.beautiful C. mountainous D. difficult C. quite