__  it was hard for children to leave family and friends, many families chose to send their children

to America.    [ ]

A. Because

B. Although    

C. If    

D. As

岳麓书院山长张拭曾有“流泉自清泻，触石长短鸣。穷年竹根底，和我读书声”一诗，诗中写到的场景是（）

A.百泉轩

B.碧沼观鱼

C.曲涧鸣泉

D.御书楼