Module 1 The natural elementsUnit 4 Forests and landI. Complete the sentences with the given words in their proper forms.（用所给单词的适当形式填空)1) Trees are very _for some birds to build their homes. (importance)2) There are more and more tall _in Shanghai recently. (build)3) In autumn, the _ turn yellow and fall off the trees. (leaf)4) I have some net-friends from other_. (country)II. Fill in the blanks with the proper forms of the given verbs.（用所给动词的适当形式填空）1) Stella sometimes_lunch at school.(have)2) They _(visit) Changfeng Park if it_ (not rain) tomorrow.3) Where _you_? Tom is looking for you everewhere. (be)4) Dont _the river.(pollute)5) People use trees _ furniture. (make)III. Fill in the blanks with proper prepositions.（用适当的介词填空）1) Birds make their homes_trees.2) Oceans provide food_people.3) In the countryside, some people cook food _ wood.4) We can get wood_forests.5) Peter and Joe are reading some information _forests.IV. Rewrite the following sentences as required.(按要求改写句子)1) The final exam will come soon.（改为否定句）The final exam _ _ soon.2) I cant enter the room because I have lost my key.(对划线部分提问)_ _ you enter the room?3) The birds build their homes in the hollow of the tree. (对划线部分提问)_ _ the birds build their homes?4) People must keep the environment clean.(对划线部分提问)_ _ people do?5) Forests are important. (改为感叹句)_ _forests are!