3 . 例如，科学考察船可以帮助应对像气候变化这种重要的问题。
For example, scientific research ships can help ______ ______ ______ such as climate change.

4 . 根据语境，选择下框中的单词或短语，必要时用正确的形式填空。框中有两个为多余的单词或短语。

feel at home             motivate             strength                  expose                  consist of     regardless of            subscribe to          consume                 adapt to               cooperate

1. By the time he decided to come back to China, he found that he ________ the life in the USA.
2. John’s ________ for learning is to fulfill his dream to be a scientist one day.
3. I believe studying abroad can help you________ your abilities in cross-cultural communication .
4. There is convincing evidence of a link between ________ to sun and skin cancer.
5. In America, a typical lunch may________ a burger or sandwich, a vegetable or fruit salad, a dessert and a cup of cola or coffee.
6. All ethnic groups, ________ their population, have the same legal status and enjoy various rights according to the law.
7. After this event, John no longer ________ the view that the disabled are unsuitable to be teachers.
8. Nowadays, people prefer household appliance with higher efficiency and less energy ________.

6 . 他到前台去办理退房手续了。
He had gone to the reception desk to ________ ________.