there are hundred of students on the piayground ,hundred要不要加s?

There are only ( ) students.a.nine hundred b.There are only ( ) students.a.nine hundred b.nine hundred of There are（）students in the hall.hundred of a hundred of hundreds of There are five_____students in our school.A.hundreds of B.hundreds C.hundred D.hundred of There are ____ trees in our school.A.hundred of B.five hundreds C.five hundred of D.five hundred There are about five __ student in our schoolA hundred B hundredsC hundred ofD hundreds of there are hundred of students on the piayground ,hundred要不要加s? 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 There are ( )students in our gradeA.six hundred B.hundreds of C.six hundreds of D.six hundred of 选择 there are four ________students in our school.a.hundred b.hundreds c.hundreds of d.hundred of There are over nine students in our school.A.hundred B.hundreds C.hundred of D.hundreds of There are over nineteen_students in Sonia's school. A.hundred B.hundreds C.hundred of D.hundreds of There are two ________people in the meeting room.A. hundred B. hundreds C. hundreds of D. hundred of解释 There are more than three _____workers in the factory.A.hundreds B.hundred C.hundreds of D.hundred of There are _____of stars in the sky.A.hundreds thousandsB.hundred thousandsC.hundreds of thousandsD.hundred of thousands There are two ( ) people in that building.A.hundreds of B.hundred C.hundreds D.hundred of There are five ________ students in the school.A hundred of B hundreds of C hunreds D hundred there are about five ( )young trees on the hilla.hundred d.hundreds c.hundred of d.thousand of There are ( )trees in the parkA five hundred B five hundreds C five hundred of D five hundreds of