Dr．Frank failed many times but he finally _______ to find a successful way to solve the problem．
| A．broke off | B．broke up | C．broke down | D．broke through |
There is a ______ going on in America public schools over the best way to teach English to foreign students.
| A．decision | B．debate |
| C．quarrel | D．conclusion |
—Can I go out to play, Mom?
—You can ______ you stay in the garden.
| A．as if | B．as long as |
| C．now that | D．in order that |
All people, ______ they are old or young, rich or poor, have been trying their best to help those in need since the disaster.
| A．even if | B．whether |
| C．no matter | D．however |
______ he works hard，I don't mind when he finishes the experiment.
| A．As long as | B．As well as |
| C．So far as | D．As soon as |
I could ______ he was surprised from the expression on his face.
| A．look | B．say |
| C．watch | D．tell |