Teaching is a highly-complex occupation because teachers take on ______.

A．Going to the class together tonight.
B．They both not going to the class.
C．The woman just forgetting about the class.
D．Attending the class, but slipping from it halfway.

A．He agrees with the woman.
B．He hasn’t been to a game recently.
C．He doesn’t know much about basketball.
D．He doesn’t think the team has been playing well.