第一节：单项填空（共20小题，每小题1分，满分15分）
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。
1. He is only 11-year-old boy, so he can’t do so much work in hour.
A. an, a B. an, an C. a, an D. a, a
2. I am glad that I have learned at least 5 English songs last month.
A. by B. before C. since D. until
