请选择CBA+S/e/P6r-f:k6n2`+X4B6x)xThere are _____ students in our class．That is 19 boys and 21 girls。2h6A3G'P/R/T
A．forty2h6A3G'P/R/T
B．fourty2h6A3G'P/R/T
C．fourteen2h6A3G'P/R/T