用算式表示“比-3℃低6℃的温度”正确的是（　　）

A．-3+6=3

B．-3-6=-9

C．-3+6=-9

D．-3-6=-3

This book tells____ life story of John Smith, who left____school and worked for a newspaper at the age of 16

A．the, the

B．a, the

C．the, 不填

D．a 不填