1. A) at considerable extent
B) to considerable extent
C) to considerate extent
D) at considerate extent
2. A) establishes
B) plays
C) makes
D) obtains
3. A) but
B) however
C) and
D) as
4.A) possible
B) easy
C) not impossible
D) impossible
5.A) they
B) some
C) it
D) we
6.A) plant
B) jobs
C) machines
D) themselves
7.A) while
B) when
C) as
D) and
8.A) that
B) if
C) which
D) /
9.A) that
B) who
C) whose
D) of which
10.A) been
B) developed
C) found
D) learned
11.A) With
B) Such
C) Like
D) /
12.A) a more
B) more
C) most
D) the most
13.A) with
B) without
C) in
D) of
14.A) They
B) It
C) Some
D) Most
15.A) related to
B) connected with
C) relative to
D) related with