计算84÷(﹣7)等于 [ ]
A.﹣12
B.12
C.﹣14
D.14
答案:A
隋朝的开国皇帝是隋炀帝,于589年完成南北统一。 ( )
He always holds a positive attitude _________ anything.
A .with B to C .for D. on