There are some differences between physical and mental______.
A. action
B. position
C. labor
D. housework
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Last month, he was elected _______ chairman of the artists' association.
A. a
B. an
C. the
D. /
There is a boy outside; he is from a house across _____ road.
A. a
B. the
C. an
D. /
We failed four times, but we have made up our minds to try_____.
A. fifth time
B. five times
C. a fifth time
D. the fifth time
At last, Mary ____ teaching as her career.
A. looked up
B. took up
C. stood up
D. went up