试题题干
In each of the following groups of words, there are four underlined letters or letter combinations marked A, B. C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation.
参考答案
正确答案：
试题解析
本题考查ow的发音。
allow：[əˈlaʊ]，fellow：[ˈfeləʊ]，now：[naʊ]，cow：[kaʊ]。
ACD三项中ow发/aʊ/，B项中ow发/əʊ/，故选B。