a number of foreigners visited our school yesterday中为什么用a nu

a number of foreigners visited our school yesterday中为什么用a nu 1.There （ ） a large number of students in our school .The nu david,our,yesterday,a,cartoon,artrst,famous,visited,school,n Last week a group of ____ visited our school (canada) A number of students in my class_________from Beijing.The nu A large number of foreigners visit Guizhou Province these ye The number of the students in our school ( )2000.A number of a great number of/ a good amount of /a great many of/ the nu The foreigner visited our school yesterday The number of students in our school ____ 4000 and a number ( )of students in our school ( )from America.A .A number is I n our school library,there_ a number of books on science a