50、We need to find a solution before the problem becomes more serious. It's important to address the issue now
before it __________.
(A) escalates
(B) eliminates
(C) escapes
(D) evaporates
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統計: A(42), B(2), C(4), D(8), E(0) #3269065
統計: A(42), B(2), C(4), D(8), E(0) #3269065