26. _____ about what he had done, the shy boy ran away as fast as possible.

A．Having embarrassed

B．Embarrassing

C．To embarrass

D．Embarrassed

实践的最基本的彤式是

A．改造世界的物质活动
B．改造自然的生产劳动
C．一切创造性活动
D．推动历史进步的活动