请选择ABC-R)d8t,b+^5s Tom _______ busy yeaterday.*y1y:N;m/^3C7D9r
A、did*y1y:N;m/^3C7D9r
B、 was*y1y:N;m/^3C7D9r
C、were*y1y:N;m/^3C7D9r