维护失修棚是应（）
A.观察顶帮是否稳定
B.进行敲帮问顶
C.提前用长把工具处理掉活煤、活矸
D.检查所需工具跟材料是否到位
参考答案：A, B, C
A beekeeper has a to motivate the bees by leaving some honey in the hive—not so much in case that the bees stop working.
A．trick
B．tool
C．talent
D．desire
When all the pupils and ________,Miss Brown gave out the new reading books to them.
A set off Bsettled down C gone ahead D brought up
