______ the matter a secret , Jim told his father all that had happened .

 A．More than keep                B．Rather than keep

 C．Rather than keeping                 D．Without having been kept

I hear you’ve employed Jack, but he didn’t mention _____when we talked on the phone. 

A.to employ    B.having been employed  C. having employed  D. to be employed

 ________ around the Tian An’ men Square, the tourists from Iceland were taken to visit the Palace Museum.

A. Showing     B. Having shown    C. Being shown     D. Having been shown

 —Will you go to the party?

   —Of course I will       .

   A. if invited                            B. if having been invited          

   C. if I was invited                 D. if to be invited

_____ scores of times , but he still couldn’t understand it ．

A．Having explained                     B．Having been explained

       C．Though it was explained                D．It was explained