问题
选择题
Many a student ____ wearing MP3 players while walking on the street．It’s quite dangerous．
A．is used to
B．are used to
C．was used to
D．were used to
答案
答案：A
考查主谓一致和时态。Many a加单数名词作主语时，谓语动词用单数，排除B,D；根据句子，指的是一般的情况，要用一般现在时态，所以选A。