43. What does “their” refer to in line 9 of the passage? (A) students (B) teachers (C) interactions (D) tools

42. Which of these statements is NOT stated in the passage above? (A) Time constraints prevent a lot of people from using blogs. (B) It is quite meaningful to read and write for real purposes through blogging. (C) People who have similar interests can discuss interactively on blogs. (D) Anyone who can use word documents would be able to create their own blogs.