1.Mr.Smith offers us some advice on how to write a good composition,which _____ the following steps.
横线处填的是includes 请问一下为什么要加s?“提供我们一些建议”不是多个“建议”吗?为什么加s?
2.Then we start to shape our thoughts____our own words and finish our writing in the given time,
横线处填的是in “用我们的语言……” 想问下,这里能不能用by in和by这两个“用”有什么区别?什么时候该用哪个?