Either dentist or dentistry
Answer:
They are missing and lacking warm clothes and food.
Explanation:
" <em>My people, some of them, have run away to the hills, and have no blankets, no food. No one knows where they are—perhaps freezing to death.</em><em> </em>"
In colloquial English 'them" would be acceptable
In formal English 'they' is used accompanied by the corresponding auxilliary verb
So, you could also say Is everyone who works in this store as helpful as they are ?