阿摩線上測驗
11. A________ of covid-19 cases in China prompts a citywide lockdown.
(A) cluster
(B) few
(C) team
(D) collective
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統計： A(9), B(1), C(1), D(0), E(0) #3024591
統計： A(9), B(1), C(1), D(0), E(0) #3024591
