社会保险制度的存在基础是（）。
A.自然灾害的客观存在
B.劳动风险的客观存在
C.劳动者弱势地位的客观存在
D.工人运动的直接结果
参考答案：B
试述嫉妒心理的特点及其危害性。
So,（）this weekend, Kate? Oh, Diane and I went for a drive in the country.
A.what did you do
B.how well did you play
C.how good were you
D.when did you go
