一、根据句意及所给中文提示、英文解释或首字母，写出句中所缺单词或短语。
1. That woman is a great (斗士)who is calling for a better environment.
2. Though (俄罗斯人)are facing great difficulties, they support the famous man strongly.
3. The Chinese scientists are warmly welcomed by (南非人).
4. He (to produce or design sth that has not existed before)a new type of computer language that was easier to learn and understand.
5. No other E country had so few privately owned businesses.

一、1. fighter 2. Russians 3. South Africans 4. invented 5. European

二、用括号中所给词的适当形式填空。
1. Jill is an (Italy), but she speaks Chinese very well.
2. One of the most famous (science)to study adaptation(适应)was Charles Darwin.
3. Nelson Mandela (fight)for the rights of black Africans all his life.
4. It is said that Shen Nong was the first (discover)tea as a drink.
5. —Who do you think is the (great)scientist in China?
—I think Yuan Longping is.
6. Of all the great (invent)in history, I admire Thomas Edison most.
7. As we know, Christopher Columbus is a great (explore).
8. That boy (discover)a new star when he was in primary school.
9. Lu Xun is a great (write)and he is respected by many people.
10. Columbus was one of the first (Europe)to discover America.

二、1. Italian 2. scientists 3. fought 4. to discover 5. greatest 6. inventors 7. explorer 8. discovered 9. writer 10. Europeans

三、单项选择。
()1.Christopher Columbus was explorer from European country.

A.a；an
B.an；a
C.a；a
D.an；an

三、1. B 【点拨】表示数量“一”用不定冠词；explorer的发音以元音音素开头，用an修饰；European的发音以辅音音素开头，用a修饰。故选B。

()2.Scientists who are full of always come up with new ideas and bring great changes to our life.

A.instruction
B.instrument
C.invention
D.introduction

2. C 【点拨】句意：充满创造力的科学家们总是提出新的想法并给我们的生活带来巨大的变化。故选C。