1. —There is a story here in the paper about a 110-year-old man.

—My goodness! I can’t imagine ______ that old.  (2006.江苏)

A to be      B be have been    

C being       D having been

2. Daddy didn’t mind what we were doing, as long as we were happy, _____ fun. (2005年重庆)

A had      B have     

C have     D having

3. He _____ have completed his work, otherwise, he wouldn’t be enjoying himself by the seaside.

A should      B must      

C wouldn’t  D can’t