—How many new words are there in _______lesson?
—There are only _______.
| A．five; fifth | B．fifth; five |
| C．the fifth; the five | D．the fifth; five |
—Do you like playing computer games?
—No, but I ______ .
| A．didn't use to | B．wasn't used to |
| C．was used | D．used to |
Don't let yesterday ______ too much of today.
| A．put up | B．use up |
| C．look up | D．get up |
Most people have realized the ______ of protecting the environment.
| A．success | B．importance |
| C．experience | D．experiment |
Peter is honest boy and______ good friend of mine.
| A．an; a | B．a; the | C．the; a | D．a; an |
I bought a new book in the bookstore. My mother asked me.
| A．how much did I pay for the book |
| B．how much I spend on the book |
| C．how much the book cost'me |
| D．what's the price of the book |