There is/are____monomorphemic word(s) in the following words:bir

There is/are____monomorphemic word(s) in the following words:bird,feet,took, want,shapes.
A、1
B、2
C、3
D、4
【正确答案】：B
【名师解析】:题目中的单词bird, feet, took, want, shapes中，bird, feet, took, want都是单根词（monomorphemic words），因为它们都是由一个词根构成的。而shapes是由词根shape和后缀-es构成的，所以它不是单根词。因此，这五个单词中有四个是单根词，所以正确答案是选项B.2。