1. Dairy farming is _____ leading agricultural activity in the United States.
(A) a
(B) at
(C) then
(D) none

2. Although thunder and lightening are produced at the same time, light waves travel faster _____, so we see the lightening before we hear the thunder.
(A) than sound waves do
(B) than sound waves are
(C) do sound waves
(D) sound waves

3. Beef cattle _____ of all livestock for economic growth in certain geographic regions.
(A) the most are important
(B) are the most important
(C) the most important are
(D) that are the most important

4. The discovery of the halftone process in photography in 1881 made it _____ photographs in books and newspapers.
(A) the possible reproduction
(B) possible to reproduce
(C) the possibility of reproducing
(D) possibly reproduce

5. Flag Day is a legal holiday only in the state of Pennsylvania, _____ Betsy Ross sewed the first American flag.
(A) which
(B) where
(C) that
(D) has

6. _____ vastness of the Grand Canyon, it is difficult to capture it in a single photograph.
(A) While the
(B) The
(C) For the
(D) Because of the

7. Speciation, _____, results when an animal population becomes isolated
by some factor, usually geographic.
(A) form biological species
(B) biological species are formed
(C) which forming biological species
(D) the formation of biological species

8. In its pure state antimony has no important uses, but _____ with other substances, it is extremely useful metal.
(A) when combined physically or chemically
(B) combined when physically or chemically
(C) the physical and chemical combination
(D) it is combined physically and chemically

9. The dawn redwood appears _____ some 100 million years ago in northern forests around the world.
(A) was flourished
(B) having to flourished
(C) to have flourished
(D) have flourished

10. Beginning in the Middle Ages, composers of Western music used a system of notating their compositions _____ be performed by musicians.
(A) will
(B) that
(C) and when to
(D) so they could

sepi sekali ya thread ini. Ayo coba diramaikan kembali. Siapa tau masih ada yang butuh.
http://www.iief.or.id/index.php?opti...id=313&lang=id