阿摩線上測驗
17. ______ about 500 million people or one-third of the world's population became infected with this virus.
(A) That the estimate
(B) That is estimated
(C) It is estimated that
(D) An estimate that
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統計： A(0), B(0), C(1), D(0), E(0) #3451321
統計： A(0), B(0), C(1), D(0), E(0) #3451321
