– Why don't you go out to have fun?
– You see, we are studying for the tests these days. And we are ______ busy_____ we can't go out.
A：too, to
B：enough, to
C：so, that
D：not so, that
group by yourself help play happen
英国学者安德鲁•波特说：“当英国人从陶醉中惊醒，猛然看见帝国上空的夕阳时，新的太阳已经在大西洋另一端的美洲大陆上升起。那将是世界大国命运的又一次兴衰消长。”引起 “又一次兴衰消长”的主要原因是（ ）
