阿摩線上測驗
42 The skywalk allows tourists to take in the breathtaking mountain view of the narrow deep valley down
which the torrents of the waterfall _______ .
(A)trickle
(B) tumb le
(C) cascade
(D) fi Iter
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統計： A(7), B(11), C(29), D(6), E(0) #1227879
統計： A(7), B(11), C(29), D(6), E(0) #1227879
