I. 每空填一词，使该句与所给句子的意思相同。 1. Because he was ill, he didn’t go to school. _____ ______, he didn’t go to school. 2. When she was walking along the street one day, she met an old friend of hers. ______ ______ the street one day, she met an old friend of hers.

Being ill

Walking along

Revision of ving forms