改错1.She asked me if I had found out my new pen.

改错1.She asked me if I had found out my new pen.
1.She asked me if I had found out my new pen.
2.He had changed so much that I could hardly know him.
3.I learnt of from Joan that Mary had fallen ill.
4.I didn't hear you.Please repeat the sentence again.
每句有一个错