【題目】Don't be so anxious about that. Helen________a note.

A．may leave

B．should leave

C．might have left

D．can have left

【答案】C

【解析】由前面的語境可知，后一句表示“Helen可能留了一個條子”，故C項正確，can表示推測時不用于肯定句中。

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