阿摩線上測驗
10. New staff have a ________________ period of fourteen weeks before their contract is made permanent.
(A) unconditional
(B) heuristic
(C) empirical
(D) probationary
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統計： A(42), B(23), C(61), D(303), E(0) #2905534
統計： A(42), B(23), C(61), D(303), E(0) #2905534
