请选择ABCD4].L/r-l2z2V4V/W*h:K Paul doesn"t have to be made ___. He always works hard.7[/h'I3\2D(V6Y.y
A. learn7[/h'I3\2D(V6Y.y
B. to learn7[/h'I3\2D(V6Y.y
C. learned7[/h'I3\2D(V6Y.y
D. learning7[/h'I3\2D(V6Y.y