阿摩線上測驗
41. What is the main idea of the passage?
(A) Dogs can learn to help the disabled.
(B) Dogs can search for missing persons.
(C) Dogs can identify diseases in humans.
(D) Dogs can do tricks to entertain people.
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統計： A(24), B(17), C(114), D(10), E(0) #2343152
統計： A(24), B(17), C(114), D(10), E(0) #2343152