灯光照射就隐形的颜料:填空 改错

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we are _______the exam.(=we are ready to have the exam.)我们已准备好了考试。
his uncle _____( 死)three years ago

改错。
i happened meeting an old friend of mine in the park.

1 we are ready for the exam.
2 his uncle died three years ago

I happened to meet an old friend of mine in the park