They did a very good job.More than one student_____praised by the teacher. [ ]

A.was

B.were

C.is

D.has

我国长江中下游地区是著名的”鱼米之乡”，而世界同纬度地区多是沙漠，主要是由于我国（　　）

A．距离海洋近

B．光照强

C．地形地势优越

D．受季风影响