We were listening closely to the lecture yesterday evening when suddenly the light ________. [ ]

A. had been gone out

B. go out

C. was gone out

D. went out

药品生产企业销售乙类非处方药时，开具的销售凭证应标明（）

A.供货单位名称、药品名称、生产厂商、批号、数量、价格、规格

B.供货单位名称、药品名称、规格、批号、数量、价格、有效期

C.药品名称、数量、价格、批号、储运条件、批准文号、规格

D.药品名称、生产厂商、数量、价格、批号、规格