平行板电容器的两极板A、B分别接于电池两极，如图所示。一个带正电小球悬挂在电容器内部，闭合电键S，电容器充电，这时悬线偏离竖直方向夹角为θ，那么（  ）

A．保持电键S闭合，若使A板向B板靠近，则θ将增大

B．保持电键S闭合，若使A板向B板靠近，则θ将不变

C．先将电键S断开，再使A板向B板靠近，则θ将增大

D．先将电键S断开，再使A板向B板靠近，则θ将不变

_______, and students having returned, the school will start with ________ effort in the work that lies before it.

A．The summer vacation is over; refreshing

B．As the summer vacation over; renewed

C．The summer vacation being over; renewed

D．With the summer vacation being over; refreshing