用所给单词的适当形式填空。 1. Look at the book. It's about a girl _____ (call) Alice.? 2. The girl was sitting by the river with a book. _____ (sudden) a white rabbit ran past her. 3. A cat was sitting in a tree and it was_____ (smile) at everyone.? 4. Shall I read the text once or_____ (two)?? 5. Mr.Zhang has gone to America on _____ (busy).