在一垒、一、二垒、一二三垒有跑垒员，由于击跑员即将进占一垒，使原来占句该垒位的跑垒员被迫进占向下一个垒位时为（）。
参考答案：封杀
It is hard to imagine what I ___ today if I hadn’t been admitted to Nankai Middle School 15 years ago.
A．would have done
B．will do
C．am doing
D．would be doing
何谓三山五岳？
