题目内容
单句改错
When I returned there, I found the book going. ________________
going→gone
When he came to his office, he found his bag missed．
When I came to Tom’s home, they were at the table．
____________________
When offering help, one usually offers his thanks for that．
________________________________
When did the earth come into exist?
When the policemen arrived at the airport, the plane had already gone off．________
