以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！

1．It was so narrow and small that we had to be careful to ________　________　________．

2．She once gave a magic book to Yu the Great and helped him ________ the flood ________　________．

3．For years it has been a strong attraction to me, but ________　________　________ I had never actually climbed it．

4．When we finally found ourselves under the highest layer of clouds, ________　________ we had glorious views of hills which had a kind of unimaginable beauty．

5．The Great Wall is different from ordinary city walls ________　________ it extends itself continuously for miles and doesn't encircle a city．

6．The Chinese name Changcheng or“Long Wall”________　________　________ because of its length．

7．According to records ________　________ in Chinese literature, as many as 20 principalities and dynasties took part in constructing the Great Wall．

以下是从本单元课文中摘出的原句。试试看，能填上吗？要注意词形变化！

1．Trying to be correct all the time is hard work and it can ________ you ________ communicating well．

2．You learn in different ways and at different time ________ the situation and what you are learning．

3．Then you should ________ your weaknesses and exert your strong points to the utmost．

4．If you score ________ between 9 and 13, you are probably a ________ learner．You seem to learn languages ________ really working hard and like to talk with people．

5．You should study the descriptions of the analytic and relaxed learners．This might help you ________ what your weaknesses are and what subjects you ________．

6．You may ________ how other students learn English and read some books that tell you how to learn a foreign language．

下列词汇为本单元出现的考纲词汇的派生词。填填看，掌握了它们的用法了吗？

1．New furniture is too ________; we'll use the old pieces．

2．The railroad connects two cities, ________, New York and Chicago．

3．He surrounds himself with attractive, ________, or well-known people．

4．The steam engine is a ________ invention．It marks the coming of a new era．