He has already worked for ______ hour.
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I read ______story. It is ______interesting story.
A. a, an
B. a, a
C. the, the
D. /, an
Britain is __ European country and China is ___ Asian country.
A. an, an
B. a, a
C. a, an
D. an, a
When do you have _____breakfast every day?
A. a
B. an
C. the
D. 不填
______China is _____ old country with _____ long history.
A. The, an, a
B. The, a, a
C. /, an, the
D. /, an, a