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Match the phrasal verbs to their definitions connected with the meanings in the texts.
1.catch up with a.to have a good relationship
2.fall behind b.to begin to do something as a pastime
3. get on with c. to work hard to do uncompleted work
4.look up d. to search for a piece of information
5. go on e. to fail to keep lever with another
6. take up f. to continue