胶剂的原料有
A．动物皮
B．动物骨
C．动物毛
D．动物角
E．动物甲
参考答案：A,B,D,E
—Do you know the man ______ is talking with your father?
—Yes, he’s our head teacher. [ ]
A. whom
B. which
C. what
D. who
