21. break the news - inform or give bad news

　　22. brush up on - imporve noe’s knowledge of something through study

　　23. bump into - meet unexpectedly

　　24. by and large - in general

　　25. by heart - by memory

　　26. by all means - absolutely ,definitely

　　27. by no means - in no way

　　28. call off -cancel

　　29. cheer up - be happy

　　30. come down with - become sick with

　　31. come into -receive,especially after another’s death

　　32. come up with - think of

　　33.count on - depend upon

　　34. count out - eliminate

　　35. die down - become quiet ,become less

　　36. do without - manage without something

　　37. drop by - visit informally; pay a short visit every other - alternate

　　38. fall behind - lag; fail to accomplish something on time

　　39. fall through - fail to happen or be completed

　　40. far cry form - completely different from;a long way