1、I've heardsome advantages about the Internet ,one of which is convinence.2、Shopping online has lots ofadvantages,the most prominent of which is its convinence. 3、Internet is so interesting that it has changed our live. so和that连用，不可以用which。...
The first sentence will be better if:
I've heard sth. about the advantages of the Internet, one of which is convenience.The second one:
Shopping online has lots of ad...
