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We'll leave for Nanjing ______ next month.
[ ]
A. the B. a C. / D. an
______ Summer Palace is one of the parks in ______ Beijing.
A. The, / B. /, the C. The, the D. /, /
-- What does your mother do?
-- She's ______ teacher.
A. the B. a C. an D. /
Beijing is ______ capital (首都) of China.
He sang and played ______ piano at the concert.