_______ with what the students had done, the teacher praised them highly.[ ]

A. Delight  

B. Delighting

C. Delighted  

D. Being delighting

接种过乙肝疫苗者( )

A．乙肝五项中HBsAg、HBeAg、anti-HBc阳性
B．anti-HBs、anti-HBe、anti-HBc阳性，HBV-DNA阴性
C．anti-HBs阳性
D．anti-HAVIgM阴性，anti-HAVIgG阳性
E．HBsAg、anti-HBc阳性，anti-HCV阳性