Which of the following statement about hydatidiform mole is wrong:

A、The serum hCG gradually drops to normal after the removal of hydatidiform mole and evacuation. The longest time is no more than 9 weeks. ;
B、In partial hydatidiform mole, the trophoblast inclusion body can be seen under microscope.;
C、the follow-up of hydatidiform mole is at least 1 year after complete curettage of the uterine cavity. ;
D、once the diagnosis of hydatidiform mole is established, should perform complete curettage of the uterine cavity in time