Similar but Not the Same: “没错(méicuò)” and “不错(búcuò)”

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Please choose the correct answer to fill in the blanks.
Lǐ  Lì:   Nǐ dàizi   lǐ  shì shénme dōngxi? Shì xīn mǎi de màozi ma?
李 丽：你 袋子  里 是    什么     东西？   是  新  买   的  帽子   吗？
Li Li: What is in your bag? Is …