退货价格设计有全额退货和（）。
A、半价退货
B、全价退货
C、部分退货
D、扣点退货
参考答案：C
从研究对象上讲，教育社会学探究的主要是（）
A.广义教育
B.中观教育
C.狭义教育
D.社会教育
He doesn't do his homework _____, though he has _____.[ ]
A. carefully enough , enough time
B. enough carelessly, time enough
C. carelessly enough, enough time
D. enough carefully,enough time
