语法填空；从A、B、C三个选项中选出可以填入空白处的最佳答案
There is pen on the floor and I think pen is Mike's.
A. an; the B. a; the C. an; /
语法填空；从A、B、C三个选项中选出可以填入空白处的最佳答案
There is pen on the floor and I think pen is Mike's.
A. an; the B. a; the C. an; /
B