将下列句子合并为定语从句
1.Is he the man?You are waiting for the man.
2.He has found the key.He lost the key yesterday.
3.Can you lend me the book?You bought thebook in the library.
4.this is the ship.We travelled on the ship.
5.do you know the man?your brother is speaking to the man.
6.The boy is mike.The boy is walking with mary.
7.Is the book difficult?You read the book this morning.
8.The child is my son.The child is crying in front of the shop.