Three years( )a long time for us students A.aThree years( )a long time for us students A.are B.be C.is D.have been说出理由

three years is a long time 句子对吗?three years 做主语动词使用单数还是复数 7.Three years is a long time to be without a job. It took me three long and hard years to get a lovely little dog nemeg dion three days are还是is enough.和three years is 还是are a long time一样吗 Three years( )a long time for us students A.aThree years( )a long time for us students A.are B.be C.is D.have been说出理由 how long have you ___ there?---About three years.A.been B.gone to C.been in 为什么选A? —have they studied English They have studied English for three years.A:How long B:How soon It took me three long and hard years to get a lovely little dog.[改为反问句] three full quarters是什么意思啊源于T-Mobile,a long time industry straggler,wasable to report three full quarters of customer growth after four years of losses. --( )David and Vicky( )married?--For about three years. A How long were;have beenB How long have;have been C How long have;been D How long did;get three years Three month ___(be) a long time three years and half a year how long( )you( )a doctor?Three years A ,have:been B,have:become C,did he D,are:不填这个选哪个啊? A long time ago,I _______ in for three years.选择一项：a.lived b.had lived c.have been living d.have lived My father is ( ) than my mother. A. three years older B. older three years C. three years old two years __(be)a long time ——How long have you___China?——For three years .A.come back to B.returned C.left D.been away from ,为什么?