1.D (have/has never V3/ed)

2.B( sử dụng )

3.A(trực tuyến)

4.B(gửi thư điện tử)

5.C(look for : tìm kiếm)

6.B(but:nhưng)

7.C (HTĐ, S is/am/are...)

8.A( look adj)

9.D( HTHT have/has (not) V3/ed)

10.B(use là động từ => cần trạng từ)

Xin hay nhất 

@Lin

I go on the Internet every day, but I’ve never (1) __________ more than an hour at a time online. I’ve got laptop and also a smartphone, so I can (2)___________ the Internet anywhere. 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’s very useful for people who use the Internet (10) ____________.
1. A. spend B. spending C. spent (have + PII)
2. A. have B. use C. play (use Internet: sử dụng Internet)
3. A. online B. Internet C. computer (be online: đang truy cập)
4. A. write B. email C. send (send somebody: gửi ai cái gì)
5. A. at B. in C. for (look for: tìm cái gì)
6. A. because B. but C. although ( S + V + although + S + V: ai đó làm gì mặc dù)
7. A. is B. were C. are (danh từ số nhiều + are)
8. A. tired B. hard C. happily
9. A. change B. to change C. changed
10. A. sensible B. sensibly C. sensibleness (V + adv)