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It is            challenge for graduates to find        work as unemployment is very high nowadays.

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

 It is ______ challenge for graduates to find ______ work as unemployment is very high

nowadays.

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

It is ______ challenge for graduates to find ______ work as unemployment is very high nowadays.

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

 It is _____ challenge for graduates to find ____ work as unemployment is very high nowadays.

A. the; 不填       B. a; a        C. a 不填       D. 不填;不填

It is ______ challenge for graduates to find ______ work as unemployment is very high nowadays.  

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