单项选择题

--Can you answer that question
--Sorry, I ______.

A．can't
B．don't
C．mustn't
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单项选择题
How careless he was ! He ______ a lot of important ideas while reading.
A．kept
B．passed
C．missed
单项选择题
--Would you like a bottle of mineral water-- ______.
A．Yes, I will
B．No, please
C．No, thanks
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