矿山老空区的积水和淤泥，往往会对（）产生危害。
A.施工中的井筒
B.矿井井下
C.工业广场或生活区
D.矿井地面生产
参考答案：B
Will you help me to look for an important paper I left in my office this morning as soon as you _______？
A．arrived
B．arrive
C．will arrive
D．would arrive
绿色饭店，顾名思义，就是指在绿树丛中的饭店。
