辨析reach extend stretch loosen 请大侠们 四个词“伸长的意思” __my legs 答案选s

each是作“伸”讲时,一般是指“伸手去够某物”,例如“I stand on tiptoe to reach the apple on the tree.”意为“我踮起脚（伸手）去够树上的苹果.”而extend是指“延伸”的意思,例如“The road extends as far as the eye can see.”“道路向远方延伸,一眼望不到尽头.”stretch也有伸的意思,一般是指“伸胳膊,伸腿”,“stretch one's legs”字面上的意思是“伸伸腿”,也引申为散散步,例如“After dinner,I went out to stretch my legs.”意思就是“吃完晚饭,我出去散了散步.”至于loosen,意为“解开,松开”,没有“伸”的意思,应当是干扰项.
这样讲你明白了吗?