为什么Lake Michigan不用加冠词,而the Changjiang River需要加上冠词,这两个专有名词不都是地名吗

为什么Lake Michigan不用加冠词,而the Changjiang River需要加上冠词,这两个专有名词不都是地名吗 ___(the Lake Michigan/Lake Michigan) is one of the Great Lakes in North American.___(Suez Canal/The Suez Canal) joins the Red Sea and the Mediterranean.第一个句子选Lake Michigan,第二个句子选The Suez Canal.为什么同样是河,一个不 Lake Titicaca is smaller than Lake Michigan.用（not）as well as填空填：It means that LakeTiticaca is (——）Lake Michigan. What is the name of the Lake in northern Utah of the U.S.A.A) Lake Michigan.B) Lake Superior.C) Lake Erie.D) the Great Salt Lake. keep fish in the lake养鱼为什么不用raise而是keep? Look!The man is swimming _______ the lake为什么用across而不用through 胶体为什么不用加沉淀 It is not allowed to go boating in the lake为什么allow要加ed 为什么有些名词前面不用加冠词 汽车为什么不用液氧加煤油 I am queen.为什么不用加a? 为什么 two hundred hundred不用加s? Go home为什么不用加to 为什么go to school不用加the? get somewhere为什么中间不用加to 为什么这个speak 不用加s呢? my home is in a town on a lake这里为什么in a town在前面啊?这两个词组里面为什么不用the呢?为什么不写成my home is on a lake in a town 英语.为什么有时候主语要加BE动词,有时候不用?什么时候要加?什么时候不用加?