UNIT 6
100. The teacher told his students to clear up all the trash __________ the ground.
101. There is too much exhaust fume __________ the air.
102. They mustn’t cut down the trees __________ the forests.
103. I’m worried __________ my most recent water bill.
104. Remember to turn __________ the faucet after using it.
105. I want to turn __________ the radio to here the news.
106. The streams will be covered____________ plastics and tins.
Loga
Sinh Học lớp 12
