由 GWD-8-Q29 想到的——如果一个B只有一个A，那么A of one or more B中的A应该是单数还是复数呢？

GWD-8-Q29:

Because of a similarity to dance, synchronized swimming—exhibition swimming in which the movements
            of one or more swimmers synchronize to a musical accompaniment—is sometimes called water ballet, especially in theatrical situations.

A.      of one or more swimmers synchronize to

B.       of one swimmer or more is synchronized with

C.      of one or more swimmers are synchronized with

D.      by one swimmer or more is synchronized to

E.       by one or more swimmers synchronize to

这题我能明白为什么选C，但由此我想到一个问题不太明白请NN指点：

如果一个B只有一个A，那么A of one or more B中的A应该是单数还是复数呢？

如果一个B只有一个A，那么A of one or more B中的A应该是单数还是复数呢？

主语的中心词决定谓语动词的单复数 of的前面是单数 谓语就用单数