把古代悲剧艺术推向成熟的作家是 [ ]
A、希罗多德
B、索福克勒斯
C、埃斯库罗斯
D、阿里斯多芬
答案：B
He often rides a bike to school , but I _______to my school.
A．by bus
B．on a bus
C．by a bus
D．take a bus
银行承兑受理环节风险表现？
