问题补充：
-Thank you for me my bike riding.
- You’re welcome.
A. Help, about
B. helping, with
C. helped, with
D. helping, to
答案：
A. Help, about
(答案→)B. helping, with
C. helped, with
D. helping, to
解析：句意：——谢谢你帮我学骑自行车。——别客气。Thank you for doing sth.因为做某事而感谢你。故排除AC两项。help sb. with sth. 帮助某人做某事。故选B。
