当前我国的工程建设监理主要应当在工程项目建设的( )阶段进行。
A．决策
B．实施
C．施
D．设计
参考答案：B
— Why! I _____ get you on the phone.
— We ______ basketball on the playground when you phoned.
A．didn't; must be playing
B．couldn't; must be playing
C．couldn't; must have played
D．didn't; must have been playing
中年妆是指（）年龄段。
A、30-40
B、40-60
C、30-60
D、40-50
