近年来,出现了一种新的概念——电子商务。
1.Recent years have arosed a new concept——E-commerce.
2.In Recent years ,there have arosed a new concept——E-commerce.
3.Recent years have seen a new concept——E-commerce.
4.In Recent years there have seen a new concept——E-commerce.
哪些对?哪些不对?清说出理由,(重点是there 应该怎么用,还有see能不能当“出现”讲)
谢谢!