26. Previous search and rescue _____ to reach the trapped individuals were unsuccessful, as strong winds prevented a helicopter from landing on the volcano.
(A) attempted
(B) attempts
(C) attempting
(D) are attempting

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統計： A(45), B(20), C(41), D(9), E(0) #3007632

詳解 (共 2 筆)

#5814555

Previous search and rescue   以前面的確定後面的動詞形式

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26. Previous search...
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