TWO HUNDRED OF和 HUNDREDS OF________ the students will take part in this Engllllish speech contest.添Hundreds of 还是Two hundred of?为什么第一个不对!为什么第二个对啊?

为何说More than two hundred of the students have 为何说More than two hundred of the students have read the bookt hundreds of the students ha问题补充：为何说More than two hundred of the students have read the book.而不说More than hund hundreds of people和two hundred of people的不同 请从语法角度加以说明~（1）39.the medicine ________cool,clean and dry.A.must keep B.must be kept C.must be carried D.must be in49.________ his stamps he has collected are from Canada .A.two hundreds B.hundred of C.two hundred of D.two hund two hundred,two hundred of.hundreds of的区别 有two hundred of的用法吗 two hundreds of students还是two hundred of students hundred和hundred of有什么不同 ___the student passed the examA two hundreds ofB two hundred ofC two hundredD hundred of Two______died of could last year．A．hundreds old people B.hundreds of peoplesC．hundred old peoples D.hund red old people Each of us has to write a two-hundred-wor是two-hundred-word 还是two-hundred-words two hundreds students还是two hundred of students About ______students attended the meeting last week.A.two hundreds B.two hundred C.hundred of There are _____ teachers in the school hall,and ____ them are women teachers.A.hundred of; two hundreds B.hundreds of; two hundred ofc.hundreds of; two hundred D.hundred of; two hundred of I have read over_pages of the book.A.two hundreds ofB.two hundredsC.two hundred ofD.two hundred she has more than two hundred of stamps.有of The United States of America has a population of over____.a、two hundred millions peopleb、two hundred millionsc、two hundred milliond、two hundreds millions I have collected many foreign stamps,______ them are Australian stamps.A.Two hundred B.Two hundred of C.Two hundreds of D.Hundred of Two hundred of students went to the Great wall和Two hundred students went to the Great wallTwo hundred of students went to the Great Wall和Two hundred students went to the Great Wall哪个正确?为什么?如果两个都正确,那么翻译和区别