effort努力—effect效果—affect 影响

His efforts were wasted.他的努力都白费了。

词组：make efforts to do…做出努力

I will make efforts to arrive on time.我将尽一切努力准时到达。

effort ['efət] n.努力，成果 (4-22)

It doesn't need much______.

A effort B effect C affect

答：a
讲解：effort努力—effect效果—affect 影响，翻译：那不需要太多的精力。