阿摩線上測驗
17. ______ that college would cost his parents most of their savings, he dropped out after six months.
(A) After realized
(B) Being realized
(C) Had realized
(D) Realizing
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統計： A(119), B(27), C(67), D(292), E(0) #2752387
統計： A(119), B(27), C(67), D(292), E(0) #2752387
