60 What does “it” refer to in the last sentence?
(A) Official cooperation.
(B) The prohibited waters line.
(C) One area.
(D) The border.

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統計： A(23), B(41), C(9), D(12), E(0) #3256424

詳解 (共 1 筆)

#6138410
根據上文，最後一句提到："But a f...
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