《省政府三防指挥车免费通行证》发证单位为：（）
A、省三防指挥部
B、国家防总
C、省交通厅
D、省政府
参考答案：C
The research is so designed that once _______ nothing can be done to change it.
A．begins
B．having begun
C．beginning
D．begun
When a couple falls into a divorce or separation, their child often has to make a big in his or her life.
A．promise
B．breakthrough
C．target
D．adjustment.
