34. What would be a good title for the passage? (A) The History of Wikipedia. (B) How Encyclopedias Have Changed. (C) Encyclopedia Britannica: The World's Best Encyclopedia. (D) How to Use Encyclopedias.

31. Why did the researchers say eggs came after the chicken? (A) Because one of the egg-forming ingredients comes only from the chicken. (B) Because eggshell could be used to make a lot of products. (C) Because eggs are much lighter than the chicken. (D) Because they are British researchers.