much前加as 8.去掉time 9. the good→a 10. effective→effectively No. 4 The Australian government have the longest fence in the world. It is 9, 500 kilometers longer with 20, 000 men look after it. They often drive along it and repair it. If they don’t, the dingoes will get in. Dingoes were wild dogs, the fiercest killers in Australia. Wild animals usually kill for the food, but dingoes for pleasure. Dingoes killed 600, 000 sheeps in Queensland for ten years. The farmers felt angrily, but they couldn’t stop the dingoes. The problem was so big for the farmers to solve. So the government agreed build the fence. 【查看更多】
