問題詳情

二、綜合測驗題：請選出各空格中最適當的答案。（26 分）     People 1 the phenomenon of bad breath, or halitosis. But halitosis is now emerging as a 2 scientific subject. Millions who have bad breath probably don’t know it, which makes it difficult 3 accurate statistics about the frequency of halitosis. My own interest in this area began almost 20 years ago,when my group 4 on the development of a 5 designed to trap oral bacteria. Now hundreds ofscientists study the problem. The growth in the science reflects a general public 6 with sweet-smellingbreath. 7 many dental products are primarily for maintenance of oral health, people are 8 buyingthem to ensure that their breath is pleasant.     There remains much that we do not know. For example, we must match individual bacterial species tothe odors 9 they are associated. The details of the contributions of the 10 and the tonsils to badbreath are still incompletely understood. 11 psychologists actively study halitophobics. Yet, therecognition and treatment of halitosis can have 12 a person’s life and 13 .
1.
(A) have always been aware of
(B) have always been being aware of
(C) are always being aware of
(D) have always had aware of

參考答案

答案：A
難度：適中0.4
統計：A(2),B(1),C(1),D(2),E(0)

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