单项选择题

So many directors （）, the board meeting had to be put off.

A．were absent
B．been absent
C．had been absent
D．being absent

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单项选择题
How long did it take her to fly to Australia ？（）

A.17 days.
B.18 days.
C.19 days.
D.20 days.
单项选择题
When did Amy Johnson become interested in flying ？（）

A.In 1923.
B.In 1930.
C.After she received a BA.
D.After graduation from Yorkshire University.
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