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
本题考查划线部分的发音。
wall：[wɔːl]；shall：[ʃəl; ʃæl]；fall：[fɔːl]；call：[kɔːl]。故B选项shall中的all发音与其他三个不同。