Chia động từ sao cho phù hợp
35. laughing (be) good for your health 36. you should ( eat) less in the evening 37. I have a stomachache so I need ( take) some medicines and go to bed 38. getting healthy ( help) uou concentratre on the lessons 39. we should keep our bodies warm ( avoid) having flu and cold 40. you ( wash) the dishes yet?