For most informal dinners，you should wear comfortable，______  clothes. 

If you are _______ about Australian cities, just read the book by Dr. Johnson, which introduces them in detail.      

Ms Black is considered a ________lady by her neighbors for she often helps the poor old man next door.

Most experts agree that washing hands regularly is a ______way to prevent the spread of many diseases.

---John always thinks of others instead of himself ---So he does. It is_____of him to want to help others