11) ________ owe much of their success as a group to their unusual powers of migration.
(A) that birds
(B) A bird
(C) The bird
(D) Birds
12) If teaching _________ more, fewer teachers would have profession.
(A) pays
(B) is paying
(C) paid
(D) had paid
13) The belief in life after death is prevalent in both primitive societies _________ advanced culture.
(A) and
(B) and in
(C) and also
(D) also
14) It is usually _________ lava but gas that kills people during volcanic eruptions.
(A) not only
(B) not
(C) neither
(D) no
15) __________ the Gulf stream is warmer than the ocean water surrounding it.
(A) wholly
(B) whole
(C) as a whole
(D) a whole as
16) He worked __________, because he aspired to stand first in the examination.
(A) very hard
(B) harder
(C) much hard
(D) the harder
17) Although we often use "speed" and "velocity" interchangeably, in a technical sense " speed" is not always _________ "velocity".
(A) alike
(B) the same as
(C) similar
(D) as
18) Prices for bikes can run _______ Rs.3000/-
(A) as high as
(B) as high to
(C) so high to
(D) sp high as
19) The greater the demand, _________ the price.
(A) higher
(B) high
(C) the higher
(D) the high
20) A seventeen-year-old is not __________ to vote in an election.
(A) old enough
(B) as old enough
(C) enough old
(D) enough old as