Althoughit could be a problem if too many parents withdrew their children from school,it is a suitable option. 请问老师although和if 是虚拟语气用法么。 withdrew是过去分词。 另外if什么时候用虚拟是怎么来决定的?
... regenerate over the long run.请教一下曹老师,我认为这句话里的meaning ones that allow natural resources to
continually regenerate over the long run是非谓语作状语,修饰的是sustainable agricultural
farming practices,但是sustainable agricultural farming practices并不...