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Without facts we cannot form a worthwhile opinion for we need to have factual knowledge _____ our thinking.
#91
A
which to be based
B
which to base upon
C
upon which to base
D
to which to be based
Some companies have introduced flexible working time with less emphasis on pressure _____.  
#95
A
than more on efficiency
B
and more efficiency
C
and more on efficiency
D
than efficiency
This is _____ the most difficult job I have ever tackled.
#102
A
by rights
B
by itself
C
by oneself
D
by far