49. In line 8, the word “their” refers to ______.
(A) volunteers’
(B) residents’
(C) institutions’
(D) libraries’

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統計: A(65), B(21), C(8), D(1), E(0) #573644

詳解 (共 1 筆)

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49.【題組】49. In line 8...
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