1. Before 8000 B. C. Wheat did not grow as prolifically --- it does today.
(A) like
(B) as
(C) for
(D) than
2. Both nickel and iron are whitish metals ---.
(A) that are attracted by magnets
(B) that magnets are attracted by them
(C) are attracted by magnets
(D) magnets that attract them
3. The bark of some species of oak trees yields a substance used in --- leather.
(A) treating
(B) to treat
(C) its treatment
(D) it treats
4. Although phosphorus is an essential constituent of all living creatures, ---is among the least abundant of the mineral nutrients.
(A) what
(B) it
(C) still
(D) however
5. ---- angles of any triangle always add up to 180 degrees.
(A) If three
(B) The three
(C) Three of
(D) Three are
6. The gibbon ranges over ---- other apes do.
(A) than an area wider
(B) wider than the area
(C) a wider area than
(D) an area wider than are
7. Sarah Frances Whiting opened the --- of physics in the United States in 1878.
(A) undergraduate teaching was in a second laboratory
(B) second teaching laboratory of undergraduate
(C) undergraduate teaching laboratory was second
(D) second undergraduate teaching laboratory