1 . It is necessary for teenagers to learn first-aid techniques. (英译汉)

2 . 根据语境，选择下框中的单词替换句中划线部分的单词或短语，使之意思一致。

elegant        present        suspect        tremendous       engage        qualification          characteristic

1. In his speech, he mentioned Pearls Buck, to whose works Chinese farmers are a typical feature.
2. You must show your passport to the customs officers.
3. Actively involve yourself in voluntary work and you will see what a difference it will make to your future life.
4. Studying abroad can cost enormous amounts of money.
5. The police doubted that he had a part in the jewel robbery.
6. She has the competence for teaching English.
7. The seafood restaurant with precise French service will have extra space in its graceful dinning room because of social-distancing rules.

4 . 根据语境，选择下框中的单词替换句中划线部分的单词，使之意思一致。

apparent   prohibit   favour occupation evaluate crucial demonstrate

1. I suppose I was looking for a job which was going to be an adventure.
2. The task that we are doing is to gather and assess data from the market.
3. Looking down when talking to someone is to display respect in Japan.
4. Water is vital to keep every living thing alive.
5. It was obvious that boiling the sweet wormwood destroyed its medical properties.
6. The government introduced a law that will ban tobacco advertisements on TV.
7. I would never ask for any help from her.