4 . 词性转换
1. face: adj. ________
2. anxious: n. ________
3. significance: adj. ________
4. dizzy: adv. ________
5. embarrass: n. ________
6. casual: adv. ________
7. innocent: adv. ________
8. faith: adv. ________
9. potential: adv. ________
10. science: adj. ________

7 . When he realized he had made a mistake in the speech, he quickly made a joke to hide his e________ and lighten the mood in the room. (根据首字母单词拼写)

8 . 根据句意，选择单词或短语并以其适当形式填空。             

A. strategy       B.embarrassment       C. infection       D.documentary        E. nationality

1. Exactly which bacteria cause the ________is still unknown.
2. Yesterday’s meeting was intended to make out a survival ________ for the company.
3. His ignorant behavior at the dinner table caused much ________ .
4. The great battle was vividly recorded in the ________film.
5. All applicants will be considered regardless of religion or ________.