220. Mr. Wang was reading ______ on how to learn a foreign language when someone came to see him.

A．paper

B．a piece of paper

C．a paper

D．a sheet of paper

我国法院受理的涉外离婚案件，离婚以及因离婚而引起的财产分割，适用我国法律，认定其婚姻是否有效，适用何地法律

A．婚姻缔结地

B．婚礼举行地

C．中国

D．当事人国籍国