42. What is the best title for this article?
(A) Social anxiety and social networks
(B) Interpersonal relationship
(C) Social Network Sites
(D) How Facebook change people interact

38. Which of these is the best description of a diagram?(A) a text in another language(B) a pop up story book(C) a drawing of how a device works(D) a photo of a working machine

39. How did William get the parts and equipment he needed?(A) He bought them.(B) He made them.(C) He found them.(D) From charity.

40. How did William help others in his village?(A) He built new windmills for the others in his village.(B) He helped them make money.(C) He provided other people with electricity for their cell phones.(D) He let villagers use water from his second windmill.

41. What is the passage mostly about?(A) The cruelty of poverty in Africa.(B) The ways windmills can produce electrical power and supply water(C) The reasons why cell phones and radios don't work well in Malawi(D) How a teenage boy brought electricity and better health to his village

43. What is the best title for part A?(A) The Benefits of Social Networks(B) Identifying Users and Uses(C) What is SNS?(D) Understanding Social Anxiety

44. What is the best title for part B?(A) Understanding Social Anxiety(B) The Benefits of Social Networks(C) What is SNS?(D) Identifying Users and Uses

45. What is the best title for part C?(A) Identifying Users and Uses(B) What is SNS?(C) Understanding Social Anxiety(D) The Benefits of Social Networks

46. What is SNS?(A) Study and Social life(B) Social Network Site(C) Social Network Study(D) Society and Science

47. Who are the SNS users in the US?(A) about 75% of teenage population(B) three quarters of female population(C) half of the teenagers(D) half of the male population

48. According to the article, what is not the reasons why people suffer from social anxiety in relationto using SNS?(A) People suffer from social anxiety do not have close relationships to start with.(B) Social network sites unintentionally favor those with existing close relationships already.(C) People with low self-esteem do not have social anxiety issues.(D) People with low self-esteem express themselves poorly.