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Sir, you ______ be sitting in this waiting room. It is for women and children only.
A．oughtn’tB．shouldn’tC．won’tD．needn’t
B
考查情態(tài)動詞。shouldn’t不應(yīng)當(dāng)。句意：先生，你不應(yīng)當(dāng)坐在這個等候室，它只是為婦女和兒童的。
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