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
Some students are ______ and want to take only the courses for which they see immediate value.
A．theoretical
B．stupid
C．pragmatic
D．opinionated
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