13.  For many cities in the world, there is no room to spread out further, _______ New York is an example.14.   
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A
for which
B
in which
C
of which
D
from which
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This is Mr. Smith. _______ help I worked out many difficult problems.
#69258
A
whose
B
with whom
C
who
D
with whose
The reason ______ he gave for not coming was ______ his mother wouldn’t allow him to.
#69449
A
why ; that
B
for which ; that
C
why ; because
D
which; that
________ is where he gets all his money from. 
#69169
A
What I can’t understand it
B
That I can’t understand
C
What I can’t understand
D
Which I can’t understand it