用括号内所给的词改写下列句子1.I have a pen in the pencil-box.(he)2.Mary is playing the piano.(Tom and John)
问题描述：
用括号内所给的词改写下列句子
1.I have a pen in the pencil-box.(he)
2.Mary is playing the piano.(Tom and John)
答
1.he has a pen in the pencil-box.
2.Tom and John are playing the pianos.