2 . We need to keep pushing the __________ (界限) instead of being satisfied with ourselves whenever we achieve a small step along the journey. (根据汉语提示单词拼写)

3 . 选择并使用所给英语单词的正确形式完成句子，有两个单词为多余词。

channel   boundary   choke   purchase   priority   advertise   faith

1. Her voice was ________ with excitement when her dream star smiled at her.
2. If you want to attract more customers, try ________ on the Internet.
3. Nowadays, ________ of communication have made it possible to speak instantly with someone on the other side of the planet.
4. There are a couple of things you should put on your list of ________.
5. Scientists continue to push back the ________ of human knowledge.

8 . 根据句意，选择单词或短语并以其适当形式填空。

be committed to       bring to light       brighten up to sum up       push the boundaries        spring up get across       keep in perspective        call on throw in the towel       mount up       throw a curveball

1. The newly found papers will ________ what really happened.
2. On hearing the news that his son was admitted into a key university, his face ________.
3. When she was young, she ________ fighting against racial discrimination
4. ________, this edition of the novel is a novel with many outstanding qualities.
5. I speak slowly, but my meaning didn't ________.
6. In the future, more wind power will ________ to meet the demand for clean energy.
7. We ________ the people to work together to build a community with a shared future for mankind.
8. Never set limitations to yourself, and work hard to ________ to be better.
9. Even with a great deal of planning, it's very possible that life will ________ us ________.
10. Though it differed from what you had thought, it helped ________ your problem ________.

9 . 单词选择

A.谷；山谷 B.边界；界限 C. 结论；推论 D. 劝说 E. 教授

1. conclusion
2. professor
3. persuade
4. valley
5. boundary