________young should help________old.
A. The; the
B. The; a
C. A; the
D. A; a
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John turned round and looked at him in________surprise.
A. an
B. /
C. the
D. a
Could you tell me how to get to________Beijing Station?
A. /
B. the
C. a
D. an
This kind of________bottle can hold a kg of milk.
A. a
B. the
C. one
D. /
若有定义:doublex[3][5];则x数组中行下标的上限为____ ,列下标的上限为____。