一、单项填空 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。（本大题共15分，每小题1分）
1. This is ______music I’ve told you about. Isn’t it_______ beautiful piece?
A. a, a B. a, the C. the, a D. the, the
2. Kate was not sure ________.
A. that she should go through the third gate
B. if she should go through the third gate or not
C. which gate should she go
D. which gate she should go through
3.______ Justin ______ Paul may go with you because one of them must stay at home.
A. Not only ... but also B. Both ... or
