颜之推说:“父母威严而有慈,则子女畏慎而生孝矣。”是说父母的教育应该()
A.严爱
B.慈爱
C.严慈结合
D.顺其自然
参考答案:C
Many teens don't get enough sleep because they have too much homework to do, which ____ them
up at night. [ ]
A. makes
B. breaks
C. turns
D. keeps
一台电视机原价a元,降价20%后的价格为( )元。