As is known, one of the many benefits of ________ foreign travel is learning how to cope with ________ unexpected．

1. A.
   the;/
2. B.
   /; an
3. C.
   the; the
4. D.
   /; the

As is known, one of the many benefits of _____ foreign travel is learning how to cope with ____ unexpected.

A．the; /        B．/; an         C．the; the            D．/; the