题干
It is a rule in his family that __________ comes home earlier should cook the dinner for the family.
A：anybody
B：who
C：who that
D：whoever
答案(点此获取答案解析）
D
A：anybody
B：who
C：who that
D：whoever
（ 
是参数)被圆 
（ 
是参数)截得的弦长为