请选择BA8Y,c;u'].F0}0_/z,f同学问你有多少个气球时，他会问：)T)U5v9U3x7Y(J;^;]5c
A. Are they balloons?)T)U5v9U3x7Y(J;^;]5c
B. How many balloons?)T)U5v9U3x7Y(J;^;]5c