Exercise：

　　Choose the most appropriate choice for each italicized word in the following sentences.

　　1.Bidding them adieu we departed.

　　[A] goodbye [B] curse [C] blessing [D] disguise

　　2.The government appointed an ad hoc committee to deal with the emergency.

　　[A] on purpose [B] unintentionally [C] for a particular purpose only [D] randomly

　　3.Late again, Richard? What's your alibi this time?

　　[A] explanation [B] excuse [C] complaint [D] indignation

　　4.Sarah used to work as an ambassdor's attache.

　　[A] member of a staff with a particular responsibility

　　[B] leader of a special committee

　　[C] secret agent working for a special agency

　　[D] guardian of morals

　　5.Your statement They have been walking all day long and they must be hungry may be a priori one because they may well not feel hungry in the least.

　　[A] reasonable [B] false [C] presupposed [D] irrational

　　6.It''s a pity that his ten-year-old child is still unable to speak.He may be suffering from aphasia.

　　[A]grievance [B] loss of speech [C] loss of hearing [D] failure to communicate

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