(A) eating rice
(B) rice is eaten
(C) people eat rice
(D) is rice eaten
16 According(A) to modern astronomers, the space between the planets (B)and stars is not empty; rather he (C) is filled with something called (D) dark matter;
17. In the late nineteenth century, journalist and publisher William
Randolph Hearst established (A) a vast publishing empire that included (B)Eighteen newspapers(C)in twelve city (D).
18. Because (A) the diamond is the hardest naturally (B) substance, it is
used in industry for to cut (C), grinding, and boring other hard (D) materials.
19. An electromagnet will remain (A) magnetized only as longer (B) as electricity (C) flows through itD
20. Being (A) chemical compounds, minerals have characteristic (B)shapes and
colors, whereas (C) do rocks not (D).
21. Some of the (A) first aerial photographs (B)were taken from (C) a balloon while (D) the Civil War in the United States.
22. Beyond their (A) importance as a source (B) of food for both (C) people and animals, corn is also used (D) to produce alcohol-based fuels.
23 The Bollingen Prize in (A) poetry established of (B)the Bollingen Foundation, is a $1,000 award (C) for the year's highest (D) achievement in poetry in the United States.
24. For more eighty (A) years, scientists have argued over whether (B) life(C) exists on the planet (D) Mars.
25.Ludmilla Turkevich, known as a translator (A) and scholar in the field (B) of Russian literature, she became (C)a member of the faculty of Princeton University during (D) the Second World War.
26. The Architectural History Foundation was (A) established in 1977 to support (B) the publication (C) of important book (D) on architecture.
27.Wildlife photographers are involved of (A) a new government project to docum (B) the 50 most endangered (C) species in (D) the United States.