阿摩線上測驗
17. The street violence, the worst _ for months, erupted after police tried to dismantle the vendors' stalls.
(A) seeing
(B) saw
(C) seen
(D) having seen
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統計： A(0), B(0), C(2), D(0), E(0) #3351918
統計： A(0), B(0), C(2), D(0), E(0) #3351918
