A．接受式的学习B．合作学习C．探究学习D．自主学习新课程提倡的学习方式是( )。……

多项选择题20世纪以后教育的新特点包括( )。

单项选择题About 70 percent of the population ______ in that country in the mountains and only 30 percent of its land ______ farmland.

单项选择题—You'd better ______ work too hard like this. —I see. You mean ______ too hard makes one tired and ill.

单项选择题So far nobody has claimed the money （） in the library.

A. discovered
B. to be discovered
C. discovering
D. having discovered

单项选择题They used to quarrel a lot, but now they are completely ______ with each other.