5. Before the entire team entered the forest, two experienced hikers were sent ahead to quietly _____ the area and report back on possible dangers and safe paths.
(A)deter
(B)scout
(C)imply
(D)haunt
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統計: A(13), B(17), C(5), D(9), E(0) #3867807
統計: A(13), B(17), C(5), D(9), E(0) #3867807