Human facial expressins differ from those of animals in the degree_____they can be conrolled on purpose.

Human facial expressins differ from those of animals in the degree_____they can be conrolled on purpose.
这一道横线上填的是to which .语法方面的问题不用讲了.我只想问一下这里用的是to the degree 这个短语吗?它的意思是在某一方面吗?
Is there a shop around_____which we can get fruit?
答案选的是in which,我知道这里around是个副词,题目考的是get fruit in a shop.可是还有一个选项是from which ,我觉得也可以啊,get fruit from a shop,从商店里买水果,也可以啊.为什么不能选这个呢?
最后一个问题啦,就是on the coast ,off the coast ,tot he coast 分别的意思啦.记得以前老师说与距离海岸的远近有关,可是最近又看到一本教辅上说与在陆地上还是在海面上有关.我糊涂了.不确定的不要答这一问……我同桌也不懂这个问题.回头我还要讲给她听,错了就误人子弟了……
抱歉,最后一个短语是to the coast 打错了!