2. Our explanation seemed only to        (增加) his embarrassment.

1. Professor Smith,along with his assistants,       (从事) the project day and night to meet the deadline.

10. The new oil that we have found will improve our       (经济) .

9. I could not but question the possibility of such        (飞行) .

8 .        (政治) has never interested me.

7. The hotel is well known for its       (名人) guests.

6. We are reading about the        (成就) of the 19th century explorers.

5. The man-made satellite o        the earth every 48 hours.

4. He likes watching some h        TV plays,not modern plays.

3. The h        of today’s newspaper are full of news of the war.