Ⅰ.单句语法填空
1．What was it that distinguished her from her classmates?
2．When you come to school, please visit my office at your convenience (convenient)．
3．Whether or not the secretary will be fired is at the mercy (merciful) of her boss.
4．We all have an expectation (expect) that he can pass the driving test next week.
5．I have filled in the form and filed (file) my patent application with the Patent Office.
6．Now it is time for action, seizing (seize) opportunities that others have not found.
7．On arriving there, they set about doing (do) the experiment.
8．The boss is cautious about making promises although he is generous and kind.
