This book _____ Lucy’s. Look! Her name is on the book

1. A.
   must be
2. B.
   may be
3. C.
   can’t be
4. D.
   mustn’t be

阅读下面短文，从短文后方框中所给的五个句子中选出四个，分别填入文中相应的序号后，使短文语义连贯，结构完整。

Reading is very important to help you learn English. This book provides not only different kinds of English but also a good way to check your reading ability.

1._______.

Part 1 is Messages. In this part somebody wants to send information in writing to somebody else. There is a test on timetable and a test on text messages.

2. ________. You will find some descriptive writing in this part. There are descriptions of clothes and of a computer.

Part 3 is Places. In this part, too, many different kinds of English are shown, some informal and some formal（正式的）. There is the informal English of a holiday postcard. There is also the formal English in a thank-you letter.

Part 4 is People. In this part all the tests are about people. 3.________. There are also some biographies（传记）about famous people. There is a job application as a model to help with your writing, as well as testing your reading.

4.________, or you can do all the tests with a formal or informal text.

根据句意，用所给单词的适当形式填空。
【小题1】We all know ______________ (pollute) water does harm to our health.
【小题2】I have read five                  (twelve) of this book.
【小题3】If you are in a blue mood, you can do your hobbies to cheer                ( you) up, boys.
【小题4】To tell you the                 (true), I felt sad while you were away. 
【小题5】The children heard the                 (frighten) shout and looked at each other in fear.