单选题 Since the nineteenth century became the twentieth, Black bands were being heard more and more on the streets of New Orleans. Included in the crowd of listeners who followed them were black youngsters such as Louis Armstrong. Soon there were white bands trying to copy this Black style of playing.
A. Since
B. were being heard
C. Included in the crowd
D. were

【正确答案】 A

【答案解析】[解析] 本题中首句是说“十九世纪末至二十世纪初这段时期内，在新奥尔良街头演奏的黑人乐队愈来愈多”，since表示时间时意为“从……以来，自从……之后”，强调的是“从该动作开始的那一时刻起”。这里应将“Since”改为As“在……期间，当……时候”。