Please capitalize where necessary: with this modern crochet christmas tree you can decorate your house cozy in the winter days!
A: With this modern crochet Christmas tree you can decorate your house cozy in the winter days!

Please capitalize where necessary: during the day the air warms up to 7 degrees, but by the hour "0" the temperature barely cross the 0, pardon the pun. plus in the arbat area is windy.
A: During the day the air warms up to 7 degrees, but by the hour "0" the temperature barely cross the 0, pardon the pun. Plus in the Arbat area is windy.

Please capitalize where necessary: before you can open a o file, you'll need to figure out what kind of file the o file extension refers to.
A: Before you can open a O file, you'll need to figure out what kind of file the O file extension refers to.

Please capitalize where necessary: “now, although civil equalities have been firmly established by law in nearly every land, jewish nationalism has become the philosophy of israel. jews should not be surprised if people charge that we obtained equality before the law under false pretences; that we are still a nation within nations and that rights accorded us should be revoked.”
A:
“Now, although civil equalities have been firmly established by law in nearly every land, Jewish nationalism has become the philosophy of Israel. Jews should not be surprised if people charge that we obtained equality before the law under false pretences; that we are still a nation within nations and that rights accorded us should be revoked.”