单项选择题
After several ______ attempts to send the missile into space, the spacecraft was finally launched successfully.
A．abortive
B．difficult
C．experimental
D．preliminary
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单项选择题
Alaska's Tongass and Chugach National Forests are America's first and second largest national forests ______.
A．respectfully
B．respectively
C．respectable
D．respectantly
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单项选择题
I was so bored with the verbose and redundant style of that writer that I welcomed the change to the ______ style of this author.
A．consistent
B．terse
C．logistical
D．tacit
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