English schoolboys often show the sense of sportsmanship to a______high degree in their relations with each other.

A．precisely

B．surprisingly

C．clearly

D．essentially

人民警察因旷工或者无正当理由逾期不归还连续超过15天，或者一年内累计超过( )天的，应当予以辞退。

A．20天

B．30天

C．50天

D．60天