单选题
Only after he has acquired considerable facility in speaking（ ）.
问题1选项
A.then he learns reading and writing
B.does he learn to read and write
C.finally comes reading and writing
D.he began to read and to write
A.then he learns reading and writing
B.does he learn to read and write
C.finally comes reading and writing
D.he began to read and to write
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