Here the school bus.[ ]
A. coming
B. coming
C. coms
D. comes
答案：D
_______he is ill, _________he goes to work.
A．Although; but
B．\\
C．Although ;/
D．But; although
影响藻酸盐印模材料凝固时间的因素有
A．胶结剂的量B．指示剂的量C．缓凝剂的量D．填料的量E．温度
