帮忙翻译一段文(中译英,追加积分,很短）

Last Sunday, Wang Ming went to the zoo with his mother. They saw many monkeys, elephants and snakes. When they were taking photos, they saw a little boy crying. Then they went over to talk with the little boy and knew that he couldn't find his mother. At last,they helped the boy find his mother.
(楼上的,你的时态全错了)

Last Sunday, Wang Ming goes to the zoo with his mother. They have seen a lot of monkeys, elephants and snakes. When they took pictures, they see a little boy is crying. Then they go over to talk with the little boy and know he can't find his mother. at last,they help the boy to find his mother.

Last Sunday, Wang Ming went to Zoo with his mother. They saw a lot of monkeys, elephants and snakes. When they took pictures, they saw a little boy crying. Then they went over and talked to the little boy and knew he couldn't find his mother. At last,they helped the boy to find his mother.

Last Sunday, Wang Ming went to the zoo with his mother.They saw