My sister works in a factory. She goes home once ____ month.
A. a
B. an
C. the
D. every
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He was absent because he had caught ____.
A. heavy a cold
B. the heavy cold
C. a heavy cold
D. heavy cold
____ water is ____ liquid.
A. The, a
B. A, a
C. /, /
D. /, a
In winter ____ people often hang up wet clothes near ____ fire.
A. /, /
B. a, a
C. /, a
D. the, a
He has tried twice, and the captain asks him to have ____ third try.
A. a
B. the
C. another
D. other
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