7. D。通过文章中的word、grammar等可知这些书都是关于学习语言的，所以D正确

6. A。结合后面的“and you’ll never have to worry about it again”你再不用对语法担忧，可知表明你对语法的彻底掌握，所以选A。

5. B。根据第二栏中的“will marvel at your eloquence”可知选B。

4. C 事实细节题。根据文章最后一段中的 The explorers noted the east coast of North America and South America would fit almost exactly into the west coast of Europe and South Africa 及倒数第 2 段中的 the coastlines of South America and Africa could fit together like two pieces of a puzzle 可知答案应该选 C。

3. D 词义猜测题。根据其所在的句子 who study the movement of the continents-a science called plate… 及地理常识可知答案选 D。

2. A 推理判断题。根据文章第 1 段的第 1、2 句可知，人们直到看到从太空对地球所拍的照片后才知道从远方看地球的情形。故答案选 A。

1. B 主旨大意题。根据文章第 1 段最后一句中的 however 及全文内容可知，文章主要谈论人类对地壳表面的形成的认识。故答案选 B。

7. The four books are all about _______.

A. fiction and mysteries

B. parenting and teaching

C. literature and arts

D. language study

[答案与解析]

6. By saying “You’ll finally know your grammar backwards and forwards”, the writer means “________”.

A. You will be clearly familiar with grammar

B. You will know the history of grammar

C. You will know the make-up of grammar

D. You will learn about the future of grammar

5. If a ten-year-old boy wants himself to be admired because of his speech ability, he may buy _______.

A. Word Power

B. Word Smart Junior

C. Grammar Smart Junior

D. Grammar Smart: An Audio Guide to Perfect Usage