新概念英语第一册测试31-40.doc

新概念英语测试（Lesson 30-44）一、 单项选择。（ ）1. Look! She is _ under the tree. A. sit B.siting C. sitting（ ）2. The girl _ a letter now. A. type B. is typing C. is typeing（ ）3. There are some _ in the sky. A. clouds B. cloud C.clouds（ ）4. Now they are _ a bus. A. wait B. waiting C. waiting for