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22. People don’t know which website is useful to them, ..............................................?
23. Students have to wear uniforms in Vietnam, ..............................................................?
24. Email is a good way for people to communicate, ..........................................................?
25. The garbage can be taken out everyday, ..................................................................?
26. We must send this message by email, .......................................................................?
27. You wouldn’t like another drink, ..................................................................................?
28. Vinh would rather listen to English programs on the radio, ...........................................?
29. You had better not go out in the cold weather, ............................................................?
30. Ba ought to join her family on a day trip to her hometown, ..........................................?
31. My sister might like writing email, ...............................................................................?
32. You should attend the opening ceremony, ..................................................................?
33. You wouldn’t mind helping me with this, .....................................................................?
34. I needn’t say anything to you about it, ......................................................................?
35. Your aunt needs to grow rice on his farm, ....................................................................?
36. This is Mr. Johnson, ....................................................................................................?
37. That was Ann on the phone, .........................................................................................?
38. Those weren’t your parents over there, ........................................................................?
39. These are your cases here, .........................................................................................?
40. The Chinese invented paper in AD 105, ......................................................................?