My sister is only five, but she always tells me ____ my pictures are good or not.
| A．if | B．whether | C．that | D．how |
Her computer is different_______ mine.
| A．at | B．from | C．with | D．on |
The teacher wants us_______the classroom.
| A．to clean | B．cleans | C．cleaning | D．clean |
too much candy is bad your teeth .
A. Eat ; to B. Eating ; to C. Eating ; for
－ I won the 800-meter race yesterday .
－ !
A. Thank you B. What a shame C. Congratulations
— Must we finish our homework today?
— No, you ________.
A．can’t B．mustn’t C．don’t have to