giups minh voi, chi ghi abcd ko can giai thich Question 17. The Internet allow people ................................. * 3 điểm to stay at home and rest. to work at office. to travel around the world. to work at home. Question 18. The communication with customers is ..................................by the Internet. 3 điểm cheap very expensive inconvenient difficult Question 19. ..................................can be send by Email. * 3 điểm Documents Information Data All are correct. Question 20. It doesn’t take people ……………………. to do the shopping on the Internet. * 3 điểm a lot of time a little time less time more time