阿摩線上測驗
177.When _____ an informal introduction, first names are usually used.
(A) make
(B) made
(C) we making
(D) making
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統計： A(32), B(18), C(41), D(450), E(0) #3656345
統計： A(32), B(18), C(41), D(450), E(0) #3656345
