根据图片内容选择适当的句子。
A. The panda likes climbing trees.
B. We have English, math and music on Monday morning.
C. Li Ming is riding a bike.
已知梯形ABCD的上底AD=8cm,下底BC=15cm,在边AB、CD上分别取E、F,使AE:EB=DF:FC=3:2,则EF=____ cm.