21. What is the main idea of the reading?
(A) How carbonado is replicated.
(B) Applications of the Black Diamond in the medical field.
(C) Why Black Diamonds are valuable.
(D) How to estimate the worth of a natural diamond.

17. The street violence, the worst _ for months, erupted after police tried to dismantle the vendors' stalls.(A) seeing(B) saw(C) seen(D) having seen

18. Since 1850, average global temperatures have risen about _ the United Nations says.(A) .6 degree Celsius(B) .6 degrees Celsius(C) .6 degree Celsius's(D) .6 degrees Celsius's

19. At an interview, _ three or four effective sound bites that highlight your past successes and skills will be very helpful.(A) prepare(B) preparing(C) prepared(D) prepares

20. Climate change is _ the top of the international agenda.(A) from(B) in(C) at(D) to

22. Which of the following is one of the super diamond's properties?(A) They are tougher than any material on Earth.(B) They are very thick.(C) They resist extreme frigid temperatures X(D) They can be made into a wafer shape.

23. Which of the following statements is false?(A) Commodity prices are fluctuated daily.(B) The quality of a specific producer's product will be specified in a commodity contract.(C) Commodities are often substances that come out of theearth.(D) Commodity prices are determined by supply and demand.

24. Which of the following statements is true?(A) The spot market is where goods are bought and sold for future delivery.(B) The futures market is where goods are bought and sold for immediate delivery.(C) Only producers can use futures contracts to lock in profits.(D) Investors may make money by buying and selling futures contracts.

Question 25 is based on the following reading. (該題答對得2分)Have you ever wondered why a cup of coffee is also known as a "cup of Joe" during the 1930s and 1940s?Where was this phrase originated? One of the most agreed opinions was from the abolishment of the officers'wine mess by the secretary of the US Navy, Admiral Josephus 'Joe' Daniels. From that time on, the strongestdrink aboard navy ships was coffee and over the years, a cup of coffee became known as "a cup of Joe".Among his numerous reforms, Josephus Daniels was also known for favoring promotion from the ranks andinaugurating the practice of making 100 sailors from the fleet eligible for entrance into the Naval Academyannually, and the introduction of women into the service.25. Which of the following was NOT one of Josephus Daniels' reforms?(A) The abolishment of the officers' wine mess(B) Promotion from the ranks(C) The introduction of women into the service(D) Letting officers drink liquor on board

26. Which of the following features is NOT mentioned in paragraph 1?(A) The main purpose of the essay.(B) Supporting details on the topic.(C) Limited background information.(D) A general introduction to the topic.

27. In free healthcare, which might be a main reason for an unsustainable financial burden?(A) Unequal distribution of medical resources.(B) Difficulty in collecting money from employers.(C) People's longevity.(D) Workers' low income.