试题题干
Directions: 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
本题主要考查b的发音。
combination：[ˌkɒmbɪˈneɪʃn]，climbing：[ˈklaɪmɪŋ]，bamboo：[ˌbæmˈbuː]，ambition：[æmˈbɪʃn]。
A、C、D中b的发音为/b/，而B选项中b不发音，故选B。