. If the computer system suddenly, there will be too much trouble.
| A．breaks down | B．breaks out | C．breaks up | D．breaks in |
20% of the students of Nan Shan Senior High the school colorful clubs so far.
| A．has joined | B．has been joined |
| C．have joined | D．have been joined |
______ is the ability to do the job______ matters, not where you come from or what you are.
| A．This / that | B．That / that |
| C．It/ that | D．It/ which |
—What made her unhappy?
—_____.
| A．Because she lost her wallet | B．she lost her wallet |
| C．Losing her wallet | D．To lose her wallet |
It was very dark，____Jane seemed to know which way to take at the crossroads.
| A．or | B．and | C．but | D．as |
Noise is unpleasant, ________ when you are trying to sleep.
| A．seriously | B．specially |
| C．especially | D．naturally |