对外发布国际雪情通告时，雪情通告的简化报头中的“AA”项填写：（）.
A.ZG
B.ZZ
C.ZB
D.ZX
参考答案：D
The situation in Haiti after the earthquake was all in a mess, ______ the increasing number of robbery cases.
A．causing
B．having caused
C．caused
D．to cause
