2、Professional translators (翻译者) quite often () just one field, for example law or medicine.

8、Astronauts have brought back ( )of rock from the moon.

7、The dwarf sees farther than the () when he stands on the latter’s shoulder.

6、Our old classroom building, which was built a century ago, has become a sort of a local ().

5、“Do fish () each other?” “Yes. At least many of them do.”

4、() in decades, the leaders of the two nations shook hands and sat down to talk.

3、When you make travel plans, you’d better () that every flight can be late.