16. The study reveals that male elephants follow a strict social hierarchy ___ each member knows his rank or status.
(A) which
(B) in that
(C) in which
(D) when

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統計： A(14), B(5), C(72), D(1), E(0) #1760476

詳解 (共 1 筆)

#3649529
**in which =where
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