-Oh my god! You wear slippers to attend the conference． -I'm sorry I forgot ther
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—Oh my god! You__ wear slippers to attend the conference．
—I'm sorry I forgot there is a conference．
A．must B．can C．should D．shall
试题答案
C
解析:
考查情态动词，在这里的意思是“竟然”。第一句的句意为：天哪，你竟然穿拖鞋来开会。