1. by 1872 the United States had 70 engineering colleges, ------ astonishing expansion credited
largely to the Morrill Act of 1862.
(A) because
(B) an
(C) to which
(D) was
2. The artist Romare Bcarden was ------ whose
yellows, deep blues, and fuchsias contrasted
strongly with photographic gray in his bright collages.
(A) with a gift for color
(B) a gifted colorist
(C) a gift with colorful
(D) gifted with coloring
3. The most important chemical catalyst on this planet is chlorophyll, -------carbon dioxide and water react to form carbohydrates.
(A) whose presence
(B) which is present
(C) presenting
(D) in the presence of which
4. One theory of the origin of the universe is
-------from the explosion of a tiny, extremely
dense fireball several billion years ago.
(A) because what formed
(B) the formation that
(C) that it formed
(D) when forming
5. Roads in the United States remained crude, ------- with graved or wood planks, until the
beginning of the twentieth century.
(A) were unsurefaced or they covered them
(B) which unsureface or covered
(C) unsurfaced or covered them
(D) unsurfaced or covered