---Have you ______ been to our town before?---No, it’s the first time I ______ here．A.even; eB.even; have eC.ever; eD.ever; have e
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D解析ever意为“曾经”或“无论何时”，反义词为never，此两词常用于完成时。This is the largest fish I have ever seen．“It is/was the first time+that clause”的句型中，从句要用完成时。