基本信息
II.单项选择 （共20小题，10分）
21. It will make ____ big difference whether the opening ceremony becomes ____ success or not.
A . /; / B. a; a C. a; the D. a; /
22. The colorful lights on the teaching building ____ the festive atmosphere .
A. add up to B. are added to C. add to D. are added up to
