Hello!My name is Li Fang1.（ )Forty students in our class. Tw

Hello!My name is Li Fang1.（ )Forty students in our class. Twenty of us come to school2.（ ),because3.（ ）Ten of us come to school 4.( ),because5.( )Four students come 6.( )and six students come 7.( ),because8.( )