I have to plan my __________ (academy) work very rigidly and set myself clear objectives.
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The area (面积) can easily be worked out if you know the length and the __________ (broad) of a rectangle (长方形).
Solving problems __________ (cooperative) is a better option than resorting to competition and conflict.
Both doctors and nurses have increasingly made a __________ (special) of the care of the aged.
Agriculture used to be the __________ (economy) backbone of this country.