15.You may ________ the textbook if you
问题:
15.You may ________ the textbook if you don’t know the answer to the question.
A.refer to
B.deal with
C.look up
D.look into
15.You may ________ the textbook if you don’t know the answer to the question.
A.refer to
B.deal with
C.look up
D.look into