阿摩線上測驗
14. Recently, there have been several outbreaks of disease like legionnaire’s syndrome, and doctors
don’t know ____.
(A) what is the cause
(B) what the cause is
(C) that is the cause
(D) that the cause is
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統計： A(3), B(71), C(0), D(0), E(0) #3237233
統計： A(3), B(71), C(0), D(0), E(0) #3237233
