IX. Choose the correct answer for each gap to complete the following passage. It is estimated that about 200 million people who use the Internet computer network around the world. The Internet allows people (27)………….. at home instead of traveling to work. The Internet allows businesses to communicate with customers and workers in any part of (28)…………world for the cost of a local telephone call. Email allows (29)….. to send documents, pictures and other data from one part of the world to another in at least 5 minutes. People can use the Internet to do the shopping. (30)…….. saves a lot of time. It is possible to use the Internet for (31)………..students may connect with their teachers from home to send or receive email or talk their problems through “online” rather than attend a class. 27. A. worked B. work C. to work D. works 28. A. an B.the C.a D. one 29. A. useless B. useful C. usage D. users 30. Ạ This B. Those C. These D. They 31. A. educated B. educator C. educate D.education