Sir, you ______ be sitting in this waiting room. It is for women and children only.
A．oughtn’t to B．can’tC．won’tD．needn’t
A
根據(jù)句子意思，這是“婦女兒童的候車室，因此您（先生）不該坐在這里”，用oughtn’t to。ought to可以表示“應(yīng)該”，此時語氣比should強烈，含有“照道理應(yīng)該”，常反映客觀情況或法律、義務(wù)和規(guī)定，而should一般表示主觀看法，在疑問句中通常用should來代替ought to。
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