It ________ me that I could buy the admission ticket of the exhibition at the discount of 50% with my student card, ________ made me extremely excited.

A．happened to; that

B．occurred to; it

C．happened to; which

D．occurred to; which

¹³¹I-MIBG治疗肾上腺素能肿瘤常用剂量为（）

A.3.7～11.1MBq

B.37～111MBq

C.0.37～1.11GBq

D.3.7～11.1GBq

E.37～111GBq