精选优质文档-倾情为你奉上Module 4 Unit 7The unknown world同步练习 用词的适当形式填空1. He refused _ (do) the housework.2. She _ (explanation) the reason for being late.3. The bird in the cage has beautiful_ (feather).4. We need several different _ (knife) to make paper cutting.5. Im very pleased _ (see) you.6. I am very _ (frighten) with snakes. Dont let me see them.7. The plane landed on the _ (land) site three hours ago.8. There i