A.take a make-up exam later on.
B.make every effort to come to class.
C.spend two extra hours in class later on.
D.do extra work at home.


A.Homework and quizzes.
B.Quizzes and the final exam.
C.Class participation and the midterm exam.
D.Homework and class participation.
A.Testing.
B.Discussion.
C.Lectures.
D.Reading.
A.some radio broadcasting stations use hotlines for advertisements.
B.it is not a good idea for some radio broadcasting stations to use hotlines.
C.some people use hotlines in a wrong way.
D.some people have unclear thoughts.