【C9】A．genuineB．typicalC．convenientD．frequent

A． valuableB． appropriateC． convenientD． favorite

Although most birds have only a ______ sense of smell, they have acute vision.A．genuineB．n

【C9】A．genuineB．practicalC．pureD．clever

【C16】A．evidentB．typicalC．basiCD．considerate

【C5】A．OnlyB．RarelyC．EvenD．Frequently

Keep this reference book; it may come in ______ one day.[2008]A．handyB．usefulC．convenientD