This is the first draft of the book. Please feel perfectly free to（）on it.

6．______is very interesting．

It is very important that each cylinder should be （） scavenged before the charged air is compressed.

● The Internet is an open system, and most information is available to everyone. It is very important to add (74) to existing system for protecting the secret information.(74)

The Internet is an open system，and most information is available to everyone．It is very important to add(74)to existing system for protecting the secret information．

Big Boss deserves the best packaging designs.This sentence means the toy Big Boss is not very worth having the best out packing design.

（）? He is not very well

It is very important to（）（操舵）well.

London-is such a wonderful city．It is very large．The Thames River runs (11) the city from west to east． So the city has (12) parts: the South and the North． In the North， there are important buildings， shops， big parks and interesting places． the weather in London is good． In winter it is not very cold and in summer it is not very hot (13) the city is near the sea． People say (14 ) London is a foggy city and it often rains． It is true．Last year，when l (15) in London， Imet one of the (16) fogs in years． You could hardly see your hands in front of your face． Cars and buses moved -along with their lights on．When evening fell， the weather (17 ) even worse． The fog was as thick as milk．(18) the buses and cars stopped． I happened (19 ) ． an important meeting on the other side of the town， but it was impossible to find a car． I had to get there (20) ．( )11．

The Internet can make our lives interesting and enjoyable． Some people say that reading books (11) 0ut of date． This is not true． Reading books is a good (12) for all kinds of rea-sons．First ，reading books is fun． You can always keep yourself (13) if you like reading． This is especially useful when the weather is bad．It is a relaxing hobby，too You can really enjoy (14) in books．Next，you can read a book almost (15 ) ;in a car，in a waiting-room，on a plane，in bed even in the bath． Reading is a converuent hobby (16 ) it is easy to stop and thenstart again．(17) good reason is that reading is useful． Many school subjects depend on good reading．The more books you read，the faster you will become in reading，and (18) knowledge you will get．Your schoolwork will become much (19 ) too．Reading is (20) ．out of date． Don-t forget to read every day!( )11．

31． The book is very interesting． It is well worth_______．

It is believed that if a book is（）,it will surely（）the reader.