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)related to
D)related with
Key:BBCDC BABAB BDBAC