I. 根据首字母和上下文完成句子：
1、We Chinese have friends t          the world.
2、A large v          is a must if you want to learn a language well.
3、A good advertisement should have persuasive language and c         images.
4、Both English and French are o        languages of Canada.
5、Overwork, little rest and poor food all c        to his illness.
6、With the d         of science and technology, more new products are made.
7、I think Tom will be a good r        when you are away.
8、A well written article should have both a good beginning and a good e         .
9、Tens of people were killed, some children i         .
10、The word “not” are p         differently in the UK and the USA.
11、Our school is a non-smoking one. So smoking is b      in our school.
12、She smiled to me, i        that she had seen me.
13、This is just a copy. Where is the o       ?
14、The story is written in s       English, so it’s easy for you to understand.
15、Water is the c       of oxygen and hydrogen.
16、The blacks are fighting against r       discrimination,
17、When you look into a mirror, you will see the r        image of yourself.
18、To build up your body, you should take exercise and do some p        labour.
19、Do you have any e       methods for studying the English language?
20、Taiwan is separated from m       of China by Taiwan Strait.