第一部分英语知识运用（共两大题，满分35分）
I.单项填空（共15小题；每小题1分，满分15分）
从A、B、C、D四个选项中，选出一个可以填入空白处的最佳选项。
1. You made the same mistake for third time, dropping_____“u” in the word “unusual”.
A. a, the B. a, a C. the, an D. a, an
2. —Which of the two pens are you going to buy?
—I’ll buy _____of them, so I can give one to my friend.
A. all B. neither C. every one D. both
