1.              him before, she didn’t know he was her uncle.

A£®Not having seen       B£®Having not seen   C£®Not seeing              D£®Not being seen

2. --- How did the prisoner escape?

   --- By climbing a fence and                      someone’s car. .

 A. steal        B. from stealing      C. to steal         D. stealing

3. The squirrel was lucky that it just missed                 .

 A. catching       B. to be caught      C. being caught    D. to catch