4. He is so confident that 　　　　he annoys others.

A. some time　 　　 B. sometime　 　　 C. sometimes　 　　　　　 D. some times

3. -You should practice speaking English to your classmates as often as possible.

- 　　　　I make mistakes?

A. Even if　 　　　　 B. What if　 　　　　 C. How　 　　　　　　　　　 D. If

2. If I　　　 　your teacher, I would try my best to teach you well.

A. was　 　　　　　　 B. will be　 　　　　 C. were　 　　 　　　　　　　 D. am

1. If he gave us more help, we 　　　　　finish this work ahead of a day.

A. will　　　　　　　　　 B. would　　　　　　　 C. are able to　　　　　　　　 D. can

　 The population problem may be the　　1　 one of the world today． The world’s population is growing　 2　 ． Two thousand years ago, there were only 250 million people　　 3　 the earth． Four hundred years ago, the number was　　 4　 500 million． But at the beginning of the　 5　 century, the world’s population was about 1,700 million． In 1970, this number was 3,600 million． In 1990, the number was five billion． A　 6　 report says that the world population will　 7　 six billion by the end of the 20th century． This is just ten　 8　 after it　 9　　 five billion． People say that by the year 2010,　 10　 may be seven billion．

　 (　 )1．A. great　 B. greater　 C. greatest　 D. greating

　 (　 )2．A. faster and faster　　　 B. fast and fast

　　　 C. fastest and fastest　　　 D. faster and fast

　(　 )3．A. in