Ⅰ.单句语法填空
1．When leaving(leave) the airport，they waved again and again to us.
2．Having worked(work) for a whole day，the secretary looked exhausted.
3．He raced through the living room，only to find(find) the front door closed.
4．Not knowing(know) her address，we can't get in touch with her.
5．Though lacking(lack) a little confidence，he finished the speech successfully.
6．Being talked(talk) to，you should look into the eyes of the person.
7．Having been shown(show) around the Water Cube，we were then taken to see the Bird's Nest.
8．Having written(write) an important letter，I listened to the music for a while.
9．Judging(judge) from his expression，he was frightened of spiders.
10．There is no greater pleasure than lying on my back in the middle of the grassland，staring(stare) at the night sky.
