Write one sentence using the word "it's" properly and one sentence using the word "who's" properly.

"It's a dog" and "Who's that?"

Explanation:

The comma is putting together and shortening 'it is' and 'who is'.

It's that time of year where people put out pumpkins and scare little kids.

Who's planning on wearing a costume this year?

yes its like krisnis like in the air force .

first of all wood chucks don't "chuck" wood. none, and for the fun of the answer the amount of wood chucked would be a lot!

explanation:

a wood chuck is a ground hog, it belongs to the family of large underground squirrels. it belongs to the family of marmots. ground hogs eat grasses, berry's, and other vegetation.