1.HE KEPT WATCHING TV UNTIL HIS PARENTS CAME BACK.
= He didn't watch TV after his parents came back.
2.(what do you mean) by liquid gold?
= What is your meaning by liquid gold?
3.the mountain (is covered with) young trees.
= The mountain is full of young trees.
4.The old vase (is of great value)
= The old vase is very valuable.
5.(Remeber) to call me back.
= Don't forget to call me back.
6.Please wait here until i come back
= Please don't leave here until I come back.
7.Daisy (froze)
= Daisy stood still.
8.They vote for me because i have some experience.
= They vote for me because of my experience.
9.And here the story (comes to an end)
= And here the story comes to a close.
= And here the story ends.
= And here the story is over.
10.They are going to Hainan (in seven days).
= They are going to Hainan seven days later.
= They are going to Hainan in a week.
= They are going to Hainan a week later.
11.I don't attend the meeting . Instead ,he will attend it.
= He instead of me attends the meeting.
= He attends the meeting instead of me.
12.The old man is patient (and)helpful
= The old man is patient as well as helpful.
13.Her mother is a doctor
= Her mother works as a doctor.
= The job of her mother is a doctor.
14. What a nice day today is!
= How nice today is!
15.I think they are the best players.
= I think they are top players.
= I think they are better players than the others.
参考资料:英语牛人团
来自:求助得到的回答