1. The classification of civilizations as the Stone Age, Bronze Age, and Iron Age depends principally on the kind of tools used.
2. The rapid advances in computer technology provided the impetus for a general reappraisal of machine translation and methods.
3. The old view that every point of light in the sky represented a possible home for life is quite foreign to modern astronomy.
4. Nature seldom provides me with the word, the turn of phrase, that is appropriate without being far-fetched or commonplace.
5. China’s presence is felt, more than ever, all over the world, assuming historic dimensions in the world political situation.
6. Memories of that historic and happy occasion still linger.
7. Much that we saw in 1975 has gone, much that is new has taken its place.
8. The pace of the change distinguishes Hong Kong from most other parts of the world.
9. The quarrel led to our breaking off our friendly relations.
10. Pressure of work has delayed my answer to your last letter.
11. The 18th century witnessed the first true English dictionary, by Dr Samuel Johnson.
12. 我国生产了各种类型的高质量的机器。
13. 一想到他,我就感到十分痛苦。
14. 我昨天才接到消息。
15. 新闻的真实性是最重要的。
16. 禁止旅客在公共汽车上吸烟。延迟应由他负责,这个事实是改变不了的。
18. 周末我们常去听音乐会,参观博物馆,看球赛。