In each of the following groups of words, there are four underli

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. Mark your answer by blackening the corresponding letter on the Answer Sheet.
A、c[oo]l
B、fl[oo]d
C、f[oo]d
D、m[oo]n
【正确答案】：B
【名师解析】:在这个问题中，我们需要找出发音与其他三个选项不同的字母组合。选项A、C和D中的字母组合"oo"都发长元音/u:/的音，类似于单词"boot"中的"oo"。然而，选项B中的"oo"在单词"food"中发短元音/ʊ/的音，类似于单词"foot"中的"oo"。因此，选项B的发音与其他三个选项不同，答案是B。