module 3 第三课时 ⅰ.单词拼写 1．this part of the field has been divided off with a__________(篱笆)to keep the cows in. 2．this is a photograph of our house，with a big tree in the________(前景)． 3．a plane flew________(从头顶上)． 4．a generator________(转化)mechanical energy into electricity.
