A:should hear
B:heard
C:hear
D:was heard
如图,在△ABC中,若DE∥BC,AD=5,BD=10,DE=4,则BC的值为( )
小兰曾在洋务派创办的第一所新式学堂学习过,你知道这所学堂的名称吗( )
The lessons given by Mr Li are always interesting and________.