英语选修8 外研版module1同步练习题(1)及答案 module1 section i ⅰ.单词拼写 1.__________(极地的) expeditions are very dangerous. 2.they are polar ______________(探险家). 3.what is your ______________(每年的) income? 4.this area had a heavy ______________(降雨量) last month. 5.this place is very ______________(荒凉的). 6.you should ______________(适应) yourself to the new environment. 7.an arctic ______________(探险) is helpful for human beings.