I have to leave now I can catch the last bus.A. so that B. because of C. untilD. as soon

问题补充：

I have to leave now I can catch the last bus.

A. so that

B. because of

C. until

D. as soon as

答案：

(答案→)A. so that

B. because of

C. until

D. as soon as

解析：so that以便，所以；because of因为，由于；until直到；as soon as一……就……。句意：为了赶上末班车，我现在必须离开了。结合语境可知选A。