下列各题均有一处错误,请找出并改正
1.---(Who)stampis(this?)---(Is's)(WangHai's)
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2.---(May)I(go)(and)you?---(Certainly).
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3.(These)(are)new(Japan)(stamps).
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4.---(What's)(day)is(today?)---Is's(Monday).
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5.(Don't)(read)(under)the(sun.)
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