Choose the correct word A, B, or C for each gap to complete the following passage

I go on the Internet every day, but I’ve never (1) more than an hour at a time online. I’ve got a laptop and also smartphone, so I can (2) the Internet everywhere. Today, for instance, I’ve been (3) three times.

Mainly I just (4) my friends. I read online magazines and I look (5) information, too. I also compare prices of things, (6) I’ve never bought anything online because I don’t think it’s safe.

I’m not an Internet addict, but some of my friends (7) . One friend of mine always looks (8) because he spends all night online. Although he’s got a lot of bad marks for the exams, he hasn’t (9) his habits.

In my experience, it is very useful for people who use the Internet (10).

(1) ......................

• A. 
  spend
• B. 
  spending
• C. 
  spent
• D. 
  spends