She was playing ____piano then.
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____young should care for ____old.
A. The, a
B. The, the
C. A, a
D. A, the
The city lies on ____Yangtzi River.
A. the
B. a
C. /
D. an
He doesn’t have ____lunch at home.
A. a
B. the
C. /
D. that
We need two ____to repair the table.
A. block of woods
B. blocks of wood
C. block of wood
D. blocks of woods