Fill in the blanks with the correct usage:

Did they put (their/there/they're) clothes away.

(Your,You're) going to need a pencil.

(Your,You're) textbook is brand new.

(its, it's) a beautiful day!

Where is (its, it's) bed?

(its, it's) almost lunch time!

You are taller (than, then) I am.

The new law will go into (affect, effect) tomorrow.

This will (affect, effect) my decision.

Will this (affect, effect) the economy?

The low grade will not (affect, effect) my average.

I went (threw, through) the tunnel.

I plan to drive (threw, through) there tomorrow.

He (threw, through) water on me!

Review the (principle, principal) of the loan.

He was a man of (principle, principal).