用 which ,that,who 填空

用 which ,that,who 填空
1.The man -------- is repairing the machine is my friend.
2.Is this the factory ------- produces digital cameras?
3.The computer ----- can store a lot of information is widely used.
4.The boy ---------- gained marbles is called Mike.
5.He caught the first bus -------- started at five 0' clock.