by heart - by memory

　　by all means - absolutely ,definitely

　　by no means - in no way

　　call off -cancel

　　cheer up - be happy

　　come down with - become sick with

　　come into -receive,especially after another’s death

　　come up with - think of

　　count on - depend upon

　　count out - eliminate

　　die down - become quiet ,become less

　　do without - manage without something

　　drop by - visit informally; pay a short visit

　　every other - alternate

　　fall behind - lag; fail to accomplish something on time

　　fall through - fail to happen or be completed

　　far cry form - completely different from;a long way

　　feel like - have a desire or wish for

　　feel up to - feel well enough to or be capabele of

　　few and far between - not happening often; rate

　　figure out - determine; reason out by thinking

　　fill in for -take another’s place

　　fill sb.in - tell what sb. should know