Ⅰ词汇。根据所给汉语写出句中所缺的词语（5分）
1.We’ll visit the museum ___________(如果不,除非) it rains.
2.I’d like to help (无家可归)people．
3.The market _________(供应) customers with best vegetables every year.
4.Do you think the food ____________(尝起来不错)?
5.The __________(重要性)of was hing one’s hands before meal is that it prevents infection.
