Ⅰ.单词拼写
1．The experienced hunter ________(检查)carefully the footprints and concluded that these belonged to the wolf.
2．Professor Lee is so interested in plants that he __________(利用)almost all his spare time to plant flowers.
3．The greenhouse gas mainly caused by cars really __________(危害)the environment where we live.
4．A young man with a(n) ________(稳定的)job and salary might have the money to buy an apartment in the center of the city.
5．Several natural ________(保护区)have been set up to protect those
