7. While getting bitten by the mosquitoes, people tend to _______ their skins to stop itchy
symptom.
(A) perform
(B) scratch
(C) peek
(D) switch
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統計: A(3), B(43), C(5), D(5), E(0) #2127423
統計: A(3), B(43), C(5), D(5), E(0) #2127423