It's true that school children today work        than they did in the past, and they don't   have 

too much   free time.[ ]

A. hard      

B. harder    

C. hardly      

D. hardest

黏膜下肌瘤最常见的症状

A．下腹肿物

B．经量增多，经期延长

C．痛经

D．压迫症状

E．白带多