21. There is a ________________ of books on the shelf. (collect) 22. It is very ______________ for people in remote areas to get to hospitals. (convenience) 23. He is very _______________ with his hands. (skill) 24. It is said that water collected from the local stream is ____________ to drink. (safe) 25. We want _______________ relations with all countries. (friend) 26. I like to eat ______________, so I eat a lot of fruits and vegetables every day. (health) V)-Complete the sentences, using the comparative form of the adverbs from the correspondent adjectives in the brackets. 32. It usually rains _____________ in Central Viet Nam than in other regions. (heavy) 33. I will have to try a bit ________________ than this. (hard) 34. The hall was lighted ________________ than the corridors. (bright) 35. Times goes by _______________ when we are busy. (quick) 36. Our family has lived ______________ in the country than in the town since last year. (happy) 37. The boys were playing the game ______________ than the girls. (noisy) 38. This task can be completed _____________ than that one. (easy) 39. A tractor can plough ________________ than a buffalo or a horse. (good)