问题补充：
Tom is expecting a pet for long, but his daddy has no time to buy for him.
A. it
B. one
C. this
D. that
答案：
A. it
(答案→)B. one
C. this
D. that
解析：one 代替上文提到的事物中不确定的一个，故选B
如果觉得《Tom is expecting a pet for long but his daddy has no time to buy for him.A. itB. oneC. t》对你有帮助，请点赞、收藏，并留下你的观点哦！
