单项选择题

The author compares the duck’s third eyelid to a （）

A．tissue
B．glass covering
C．tiny brush
D．diving mask

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单项选择题
The underlined word suitor in the second paragraph means （）

A．boyfriend
B．launderer
C．tailor
D．explorer
单项选择题
When Williams began working on his book, he （）

A．was paid $35,000
B．learned to paint
C．had already buried the treasure
D．did not know what the story would be about
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