题目内容

s t ___ In alphabetical order, the missing letter on the line is()

A. r
B. v
C. u

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p ___ r In alphabetical order, the missing letter on the line is()

A. m
B. q
C. b

___ o p In alphabetical order, the missing letter on the line is()

A. r
B. v
C. n

l ___ n In alphabetical order, the missing letter on the line is()

A. m
B. o
C. b

The boy is reading a book. ()

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