1. I had used on-line shopping sites, because they are cheaper and more convenient.
2. I use an iPhone, because it has not just the functions of a normal phone, but it can get on-line very conveniently too.
1. I used online shopping site, because it is very convenient and the price is cheap.
2. I use smart phones, because it not only have the basic function of normal telephone, and the Internet is very convenient
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