at a year at one year at a time at one time 这几组词怎么区分

at a year at one year at a time at one time 这几组词怎么区分 At this time last yea什么意思 one step at a one at a one at a time one move at a One at a time FOOLISH EXPLORERS At least once a year there is always at least one fool who tries to c 5个填空1.There are lots of f____ shows in Paris every year2.My father is a computer e____.He works at t computer company.3.New Year's Eve is the n____ before New Year's Day.4.New Year's resolutions are ____(promise) you make to yourself at New Yea Once bitten by a snake ,one shies at coiled rope for ten year; one wallet at a time One At A Time 歌词 at one at a bad time of year Is this school ____we visited last year?A.which B.in which C.the one D.at which at a time ,at all times ,at one time ,at no time ,都是什么意思啊? at a time；at the time；at one time ；at times 有什么区别 last year at this