问题
选择题
A left-luggage office is a place where bags _______ be left for a short time, especially at a railway station.
A．should
B．can
C．must
D．will
答案
B
can此处表示许可；must表示义务和责任；should的意思是“应该”；will作情态动词时表示“意愿”。
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