阿摩線上測驗
30. With no _____ instructions about what to work on, the sixth graders chatted among themselves after the teacher left the laboratory.
(A) sordid
(B) explicit
(C) pliable
(D) mutant
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統計： A(53), B(514), C(50), D(29), E(0) #2008868
統計： A(53), B(514), C(50), D(29), E(0) #2008868
