I bought some CDs for my friends and they _____ me 30 dollars.
| A．spent | B．paid | C．cost | D．used |
Bob is _________ than John.
A. tall B. taller C. tallest
—What are _______ teachers doing?
—They are having a meeting.
A. this B. that C. those
There are a lot _____ students on the playground.
A. of B. in C. by
My mother asked me _____ the room.
A. clean B. cleans C. to clean
Tony has many Chinese ______.
A. stamp B. stamps C. a stamp