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<正> 1995年6月的全国大学英语四级统考题中有这样一题:Turn on the television or open a magazine and you ____ advertise-ments showing happy,balanced families.A.are often B.often seeC.will often see D.have often seen许多同学选了 B,理由似乎是时态一致。其实正确答案应为 C。那么为什么要选 C 呢?原来此题中的 and 并非表示并列