单项选择题

A．efficiency
B．efficient
C．sufficient
D．scarce
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单项选择题
To pass the running test, you must do which of the following
A．Run less than one minute on both runs, combined.
B．Run less than two minutes on one run.
C．Run less than one minute on one run.
D．Run less than seven minutes altogether.
单项选择题
The passage mentions the African Elephant, the Indian Tiger, and the American Eagle as example of which
A．Endangered species.
B．Sea resources.
C．Land animals.
D．Food supplies.
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