读图9回答20—21题。甲、乙两图所示区域农业耕作制度及作物品种不同的主要原因是:
下列能够正确体现乙图所示区域特征的是:①有广泛分布的黑土 ②雨热同期,大陆性气候强 ③水稻土 ④水田 ⑤水稻种植业 ⑥综合性工业基地 ⑦重工业基地 ⑧旱地耕作业
Many Hope Primary schools ______ last year.( )
A.is builtB.was builtC.were built
It's necessary for students ______with their teachers.( )
A.communicateB.communicating
C.to communicate
It's time for I'm a Singer,please ______ the TV.( )
A.turn onB.turn offC.open
Yu Gong kept moving the mountains,______ he was very old.( )
A.soB.althoughC.but
We ______ the tea set for three years.( )
A.have hadB.hadC.have been