34. What can we infer from the last paragraph?
(A) The study is conclusive.
(B) Self-report from the participants is not totally reliable.
(C) Most participants prefer coffee.
(D) Coffee is not a healthy drink.

30.(A) critique(C) critics(B) criticize(D) critical

31. Which of the following statements is true?(A) People who can strongly perceive the bitter taste of coffee prefer to drink tea.(B) The way we perceive different tastes affects whether we prefer tea or coffee.(C) People who drink more than one cup of coffee a day are known as heavy coffee drinkers.(D) The study shows that our age affects the way we perceive different bitter tastes.

32. Who is Jue Sheng Ong?(A) He or she works for Northwestern University in Illinois.(B) We do not know. It was not mentioned in the article.(C) He or she works in Australia.(D) He or she studies tea drinkers.

33. What is propylthiouracil?(A) a name of a drug(B) a kind of prop in theater(C) a type of tea(D) a type of coffee

35. How did the drought cause problems for William's village?(A) There was too much rain.(B) The school wasn't able to accept more students.(C) People couldn't rely on windmills for water anymore.(D) Families couldn't grow food in the dry conditions.

36. What does the title The Boy Who Harnessed the Wind: Creating Currents of Electricity and Hope suggest the book is about?(A) Instructions with diagrams and photos for people who want to build their own windmills(B) The story of a teenager who used wind power to create electricity and inspire other people(C) How to get electricity from the wind(D) A story of someone's life for teenagers who hope to become successful and earn a lot of money

37. How did William continue his education when he couldn't attend school?(A) He went to a school that his parents could afford.(B) He registered a course online.(C) He visited the local library so he could read books.(D) He created an online school for science education.

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.