单项填空；选择最佳答案。
— Do you know Mary?
—Yes, Mary is ______ girl, but she knows a lot about science.
A. a eight-year-old B. a eight-years-old
C. an eight years old D. an eight-year-old
答案
D
---_____________ are you staying at the camp?
---For about a week
A．What time B．When C．How long D．What day
─____ does your uncle live from here?
─ About 20 miles.
A．How long B．How often C．How far D．Where
— _______ can we get there?
—In five minutes.
A．How often B．How far C．How soon D．How long
—____________ will you be away?
—In a couple of weeks.
A．What time B．How soon C．How often D．How long
--______are the Olympic Games held?
--Every four years．
A．How often B．How long C．How far D．How soon
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