“非洲屋脊”是指[ ]

A、乞力马扎罗山

B、南非高原

C、刚果盆地

D、埃塞俄比亚高原

A growing number of students spend so much time on internet and TV with less and less rest and study, which _______ parents and educators very much.

A．settles

B．conquers

C．concerns

D．commands