领眼磨鞋主要是依靠进入落物内的（）将落物定位，然后随着钻具旋转，磨鞋磨削落物。
A.领眼锥体或圆柱体
B.领眼磨鞋
C.引锥
D.打捞工具
参考答案：A
Take ________ your T-shirt.[ ]
A. on
B. of
C. off
The boys and girls were happily making a snowman, _______ with cold.
A．their faces red
B．their faces were red
C．their faces turned red.
D．their faces to be red
