______ the local authorities put more attention to the safety of the children, more than 20 lives __________ in Gansu Province.

A．Should, would not be claimed

B．Had, would not have been claimed

C．Should, would not be cost

D．Had, would not have been cost

下列事例中，属于分子不停地做无规则运动的是

A．秋风吹拂，树叶纷纷落下

B．在箱子里放几块樟脑丸，过些日子一开箱就能闻到樟脑的气味

C．繁华的街道上车水马龙，很热闹

D．室内扫地时，在阳光下，看见灰尘飞舞