42. What did the author not talk about in the passage?
(A) The way sign languages were created
(B) The differences amongst sign languages
(C) The linguistic elements of sign languages
(D) The misconceptions of sign languages
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統計: A(537), B(67), C(88), D(51), E(0) #1307605
統計: A(537), B(67), C(88), D(51), E(0) #1307605