問題詳情

16.______ seeing his beloved family step out of the car safe and sound, Tom brokeinto a big smile.
(A) As soon as
(B) Until
(C) Upon
(D) Since

參考答案

答案:C
難度:困難0.276699
統計:A(60),B(66),C(57),D(12),E(0)

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