They were surprised that a child could work out the problem____they themselves couldn't.
| A．once | B．while | C．then | D．if |
--- When will your school _______ for the summer holiday?
--- At the end of this month.
| A．break down | B．break in | C．break up | D．break out |
— My teacher punished me this morning.
—Why? ______ I know, you’ve done nothing wrong,
| A．as long as | B．as far as | C．as well as | D．as soon as |
The sudden death of Kim Jong-il(金正日) had a short-term effect on Asian trade, _______the dropping of stocks（股票） in some Asian countries.
| A．relying on | B．accounting for | C．resulting from | D．standing for |
It has been announced that students _______ remain in their seats until all the papers have been collected.
| A．can | B．may | C．will | D．shall |
The reason ______ the essay（作文） of the Anhui edition of the 2012 National College Entrance Exam is voted the worst is _______ it makes test-takers at a total loss.
| A．why; because | B．that; that | C．that; because | D．why; that |