11.
A. control
B. controllable
C. controlled
D. controller
12.
A. to
B. for
C. on
D. in
13.
A. as for
B. as to
C. as
D. for
14.
A. acquiring
B. requiring
C. sustaining
D. retaining
15.
A. actual
B. realistic
C. realizing
D. true