{{i}}quEstions 18-21 ArE BAsED on thE Following DiAloguE BEtwEEn A DoCtor AnD his pAtiEnt.{{/i}}

whAt’s wrong with thE womAnA．shE hAsn’t rECovErED From hEr illnEss.
B．shE CAn’t hAvE A gooD slEEp.
C．shE hAs A hEADAChE.
D．shE CAn’t unDErstAnD thE DoCtor.