下列各句各有一处错误,请找出并改正
问题描述：
下列各句各有一处错误,请找出并改正
1.He will 20 years old next year
2.I'll go to see him when he will come back
3.——Who will speak at the meeting?
——Our English teacher is,I think
答
1 will be 缺谓语
2 he comes 主将从现
3 Our English teacher will speak,I think.