题目内容

–Have you ever _______ to Singapore?
–No, never.
A．areB．wereC．wasD．been
D
本题考查的现在完成时结构：根据句子助动词have可知本句为现在完成时态，故谓语动词要用be的过去分词。故选D。主语+have或has done+其他，只有D符合题意。
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