PASO 1Elige la opción correcta
PASO 2Agrega los ejercicios que te gustan a Favoritas
So is an adverb, and must qualify an adjective or another adverb. Such is an adjective and must qualify a noun
Here, rest is a noun, and we can't use it as an adjective in the meaning of what's left.
The adverbial form is in a friendly way. Friendly is an adjective: a friendly game, to have friendly relations with one's neighbours, etc
And is a conjunction, and can only join similar forms of speech: He came and sat down. We can't use it instead of the adverbs also and too.