一、选择填空（共30小题；每小题1分，满分30分）
A)单项填空（共20小题；每小题1分，满分20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. It’s _______ unusual thing for us to find _______ UFO.
A. a, an B. an, an C. a, / D. an, a
2. There was else at home that day, so the little boy had to look after himself.
A. none B. nothing C. somebody D. nobody
3. Be sure to get there on time, ?
A. will you B. do you C. don’t you D. aren’t you
