KWON'S ANSWER:
a. as hungry as a bear
I ate too much last night because I was as hungry as a bear

[You've got a correct sentence construction but you forget to put a period on the end of your sentence and every time you're using "because" don't forget to put a comma before writing the reason part.]

b. right off the bat
I'm as hungry as a bear, please serve my hamburger right off the bat

[I think this sentence needs to have an exclamation mark because, it's like giving a command to someone.]

c. by mistake
I browbeat the staff of Burger king into bring my burger by mistake, because I was as hungry as a bear

CORRECTION: By mistake, the staff at the Burger king gave me the wrong burger and because of that I browbeat with there staff.

[Always remember to put your words or ideas into a proper order.]

d. on the house
The staff of Burger king gave me burger on the house, because I browbeat him.

[CORRECT]

e. eat out
What do you say to eat out at Burger king which the staff is famous for giving burger on the house.

CORRECTION: Let's eat at the Burger king wherein the staffs are very famous for giving burger on the house.

f. as well as
I often browbeat at Mcdonald as well as Burge rking

CORRECTION:  I often browbeat at McDonald as well as Burger king .

g. give back
I gave back the burger which the staff gave me.



COMMENT:
Hi Sir Kwon! Thank you for answering and sending me your homework. Tank you Sir. Happy weekend and I hope that you'll finished all your degree paper sooner. Have fun and see you tomorrow.