Find the mistakes and correct them: What 'll you do in the countryside next weekend? I think I 'll had picnic there

Find the mistakes and correct them
a) what 'll you do in the countryside next weekend? I think I 'll had picnic there
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c) my sister is going to the amusement park last  sunday 
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b) when 'll the competition be ? on the playground
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d) will Children 's Day be on Wednesday ? No , it will . It'll be on thursday
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