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Only after he has acquired considerable facility in speaking______to learn to read and write.
A.he began
B.will he begin
C.did he begin
D.must he begin

A.
A.he
B.will
C.did
D.must

【参考答案】

B
本题考查倒装结构,only放在句首要求句子倒装,由于从句中动词为现在完成时,所以主句用一般将来时。题意为,只有当他已经获得了相当的说的能力,他才能开始学习读和写。