They decided _____ for the lost bird. [ ]
A. look
B. looking
C. to look
D. to looking
答案:C
甲、乙、丙3位同学选修课程,从4门课程中,甲选修2门,乙、丙各选修3门,则不同的选修方案共有( )
A.36种
B.48种
C.96种
D.192种