SINCE/BY THE YEAR OF2000的区别jake has studied chinese in this school_____the year of 2000A since B in C on D by

SINCE/BY THE YEAR OF2000的区别jake has studied chinese in this school_____the year of 2000A since B in C on D by .The price of petrol has been ______ 20 percent since the beginning of this year.A.increased to B.risen by C.increased by D.risen to the year that has passed since the downfall of apocalypse! since the last of last year与什么时态连用 The seven-year-old girl had lerant about 20 English songs______. A.since last year B.last yearC.before last yearD.by the end of last year求速度,还有理由 英语高手过来帮下忙哈～By the end of last year和By the end of this year 前面分别应该跟什么时态啊?将来完成时,现在完成时还是过去完成时?晕死了～～还有我知道since then 和since last year前面用现在完 at/in/on/since/by the end of 的区别 Math questions.150 points.The number of hours,H,of daylight in Madrid at paricular time of year may be approximate by H(t)=12+2.4sin[0.0172(t-80)] where t is the number of days since the start of the year.Find the average number of hours of daylight 用宏观经济学原理回答If the consumer price index has a value of 150 today and the base year is 1987,then consumer prices have( )A.increased by 50 percent since 1987B.doubled since 1987C.more than doubled since 1987D.declined 50 percent since 英语选择练习26选什么为什么1 The workers ( ) a new hosipital since the end of last year.2 The workers ( ) a new hosipital since by end of last year.a have builtb have been buildingc bad builtd were building We ______(learn) a number of English songs since the end of last year Since 1995,__people call the Year of the Internet ,the world has turned flat thanks to the network.A when B which C in which D by which time By the end of last year he______about 1500 English words. .will have.by the end of this year造句 the year that has passed since the downfall of apocalypse!什么意思那? They finish the bridge next year（用 by the end of next year改写） It is estimated that the price of a personal computer ______ by an average of 25% a year since 1990.A.fell B.had fallenC.is falling D.has fallen选哪个,为什么? 高中语法非谓语Oil prices have risen by 32 % since the start of the year,() a record U.S.$ 57.65 a barrel on April 4.A.have reached B.reachingC.to reach D.to be reaching