A．To ask the professor to be a bit considerate next time.
B．To authorize the professor to deal with the problem.
C．To ask the professor to deliver a speech.
D．To report the problem to the professor.

A．The food served at the stands is tasty and healthy.
B．The food the supermarket sells attracts the attention of the students.
C．Students think the service in the school cafeteria is not good enough.
D．Students got sick after they had a meal m the school cafeteria.