根据句意及首字母或汉语提示完成单词。 1. —Hello, may I speak to Lucy? —Sorry, she isn't in. May I take a m________ for her? 2. We don't have much time left. Please make a d________ as soon as possible. 3. This is her book. My_________ (自己的)book is in my backpack. 4. Mary felt sick because of the _________(稀薄的)air. 5. The building is 200 ________(米)high.