3 . 不诚实商人卖的食品含有太多的防腐剂，而含有防腐剂的食品大量食用后会造成癌症。（contain）

4 . 在人类身上使用基因编辑技术是非常危险的。它不仅违背了医学伦理道德，并且可能产生无法预知的后果。(Not)
___________________

5 . 虽然专家建议保持社交距离，美国政府却始终把重点放在复苏经济和刺激就业上，因此未能有效防止病毒的传播。(despite, failure) 5’

6 . If you don’t know the meaning of the word, you can ________ the right-hand column of page 200 of this dictionary .

A．lead to

B．refer to

C．date back to

D．get down to

7 . Directions: Complete the composition by translating the following Chinese into English.

I am Li Ming，a high school student. As far as I am concerned, our attempt to restrict the use of plastic bags isn’t very successful,    1    (导致了环境的不断恶化). Consequently,    2    (解决这个难题，在我看来已经刻不容缓了).

Firstly, it’s for our government to charge higher taxes on plastic bags. On top of that,    3    (我们应该发展循环经济), featuring the use of renewable materials. In addition, all the citizens should    4    (提高环保意识) and contribute voluntarily and jointly to the reduction of “white pollution” in our city.

    5    (我希望我的建议有用). Only with collective efforts can we protect our common home.

8 . To write the following expressions
1. 紧扣（某主题）
2. 到场，露面
3. 使圆满结束
4. 坐下来从事…，开始进行…
5. 导致
6. 做对了， 摸着门路
7. 倒计时
8. 翻开新的一页
9. 想要做…
10. 阳历
11. 与…有关

9 . Phrase filling

1. If you put yourself __________, you will find the problem easy to solve.
2. The teacher was so busy correcting papers that he would rather _________ for the moment.
3. The workaholic(工作狂) thought it a waste of time ________ hobbies.
4. During the 2016 U.S. presidential election, forty-two percent of Americans thought President Trump _________ one of the worst presidents in U.S.
5. This is the only one of the roads that _________ the palace.
6. His pride made him ________ every offer of help.