单词拼写。
根据下列句子及所给汉语注释，在句子右边的横线上，写出空缺处各单词的正确形式。
（每空只写一词）
1. They had left the _______(行李) at the station.
2. All the universities have duty to keep their students _______(见闻广的,了解情况的) of the
quick development of the scientific world.
3. The invention of the computer is a great _____________.(成就 )
4. I am going to say what I think of him openly and p________.(公开地 )
5. Everyone is responsible for the _________ (创造；建立) of a better environment.
6. People living in this area get sick easily and they are left ______(无保护的)from environmental pollution
7. This medicine will ______(保证, 担保, 确保) you a good night's sleep.
8."Thank you" - two _________(强有力的) words. They're easy to say and mean so much.
9. The events took place on a cold ________(二月)morning.
10. The bank has _______(分公司;分店) all over the country.