posted by rfvv .
1. He picked up the stone.
2. He took up the stone.
(Are both the same?)
3. Volunteer work takes up a lot of time.
(What is the meaning of 'takes up'? What other words can we use instead of 'takes up'?
1 and 2 mean about the same thing, yes. 1 is the more common usage.
3 could be rephrased: Volunteer work involves a lot of time.
Good list of "phrasal verbs" -- look them up alphabetically.
Good lists of idioms -- look at the whole collection or look them up alphabetically.