Our class team is short of one person for the coming football match. Why don’t you join us?

— _______.

A．It’s my pleasure

B．Don’t mention it

C．It’s up to you

D．It is really not my cup of tea

公安机关行使公安权力是一种( )。

A．司法行为

B．执法行为

C．守法行为

D．违法行为