第一部分：语法和词汇知识（共25小题，每小题1分，满分25分）
单项选择 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。（共25小题，每小题1分，满分25分）
11. We were dancing to ____ music when all of ____ sudden the power went out and we were left in the dark.
A. the; a B. the; / C. a; / D. /; the
12. It is sad to see him go but it won’t make a(n) ___ to the way we conduct our affairs.
A. importance B. difference C. effect D. influence
13. Helen always helps her mother even though going to school ____ most of her day.
A. takes up B. makes up C. saves up D. puts up
14. _____ to try his fortune abroad, he left for America.
A. Having determined B. Being determined
C. Determined D. To determine
