Ⅰ.单句填空
1.One funny (observe) about a problem in your life can be funny.(2020·江苏卷)
答案observation
2.Scientists in Louisiana were so concerned that they decided to pay (hunt) $5 a tail.(2020·全国Ⅱ卷)
答案hunters
3.It was his long absence from work without permission that delayed his (promote).
答案promotion
4.He was satisfied with his (earn) as an accountant.
答案earnings
5.The major goal of understanding history is to preserve (nation) traditions.
答案national
