Lucy couldn’t remember when she met Tom, but she was sure it was on ______Monday when she had ______ music class.

A．/; the

B．the; /

C．a; a

D．/; a

下列成语或诗句中，描写生物遗传的是（　　）

A．螳螂捕蝉，黄雀在后

B．人间四月芳菲尽，山寺桃花始盛开

C．种瓜得瓜，种豆得豆

D．沉舟侧畔千帆过，病树前头万木春