I/ PRONUNCIATION 1/ A. shrine B. hike C. drip D. environment 2/ A. dump B. junkyard C. pollute D. unpolluted 3/ A. environment B. prevent C. effectively D. energy II/ PREPOSITIONS 1/ Billions of cans are thrown ________ every year all over the world. A. up B. away C. in D. on 2/ Why don’t you use public buses instead ________ motorbikes? A. of B. in C. off D. on 3/ Don’t throw trash ________ the water ? A. onto B. in C. into D. on 4/ Polluted water can directly do harm ________ people’s health. A. with B. to C. on D. for 5/ If we use much pesticide ________ vegetables, the vegetables will become poisonous and inedible. A. on B. with C. to D. for 6/ They have complained ______ local authorities about using dynamite to catch fish. A. with B. about C. to D. on