31. Some vehicles beep when they __________ to warn those behind. A. ride B. reverse C. drive D. sail 32. After school, children queue up and wait for the bus __________ on the pavement in front of the school. A. safe B. bumpy C. safety D. safely 33. Because my school is close to my house, I go to school on __________. A. foot B. bike C.car D. bus 34. I often go to work late because of __________. A. berry jam B. traffic jam C. jam pot D. cherry jam 35. My father goes to work by driving a __________. A. horse B. bicycle C. motorbike D. car 36. How __________ is it from here to the nearest supermarket? – It’s about 500 meters. A. far B. long C. difficult D. nice 37. My English teacher, Mr. Nam, often drives his car __________ on the way to school. A. careful B. caring C. carefully D. careless 38. It is about three kilometers from my house __________ the hospital. A. with B. on C. in D. to 39. We must obey the traffic rules __________ our safety. A. to B. for C. on D. into 40. __________ my way to school, there is a big supermarket. A. On B. During C. At D. In