1 . The next king of Prussian, Frederick William I, to __________ the amber room belonged, decided not to keep it.

2 . He often lent me a hand when I was in trouble, _____ which I was grateful. (用适当的词填空)

3 . 阅读下面材料, 在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
1. When I came in, he pretended not ___________(notice) me.
2. Only when I read the news did I know the species were in danger of ___________(die).
3. I doubt ___________ she can get the permission to enter the competition.
4. It is because of her mother’s disagreement ___________ she is in bad mood(情绪) .
5. An umbrella is a good ___________(protect) from strong sunlight.
6. ___________(personal), I prefer to the second plan.
7. Hearing the joke, the whole class couldn’t help bursting into ___________(laugh).
8. As a result of ___________(make) one big mistake, he lost his job.
9. His suggestion was thought ___________(high) of by all the experts present.
10. He is surfing the Internet in search ___________ some useful information.
11. I would really appreciate ___________ if you could pay in cash.
12. Dinking too much is _________(harm) to your health.
13. They decided to buy the house with a big garden, whose price is also very ________(attract).
14. Many new applications _________(add) to the computer ever since it was invented.
15. Your speech was heard by a group of judges, all of ___________ agreed that it was the best one this year.