Jenny ______ with him at that time, for I was having dinner with her in my home.

A．can’t have been

B．mustn’t have been

C．must be

D．may be

宋人诗云："东家打麦声彭魄，西家缫丝雪能白。……东家麦饭香扑扑，西家卖丝籴新谷。"诗中反映了宋代（）。

A.产品商品化程度提高

B.手工业仅在乡村发展

C.开始出现独立的手工业家庭

D.手工业者脱离农业生产