二、选择填空（共25小题；每小题1分，满分25分）
A)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。
16.—_______unusual snake! It is only lcm long.
A. What an B. How C. What a D. How an
17. His seat is next to _______and the bag belongs to _______.
A. mine, he B. me, him C. me, his D. mine, him
