After so many hardships, the scientist             his motherland at last.

A．set on his foot

B．set foot on

C．set feet on

D．set his feet on

下列犯罪中，我国刑法没有规定单位犯罪的是（）。

A.走私罪

B.破坏社会主义市场经济秩序罪

C.盗窃罪

D.金融诈骗罪