阿摩線上測驗
39. What does “that” refer to in the third paragraph?
(A) A strong economy.
(B) A social welfare system.
(C) A steady supply of workers.
(D) A growing population of the elderly.
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統計： A(13), B(36), C(35), D(25), E(0) #3180650
統計： A(13), B(36), C(35), D(25), E(0) #3180650
