The reason ______ most Chinese have healthy white teeth is ______ they eat a healthy diet. 
#69649
A
why; that
B
why; because
C
that; that
D
for; that
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        that they may eventually reduce the amount of labor needed on construction sites by 90 percent.
#69828
A
Such construction robots are clever
B
So clever the construction robots are
C
Such clever construction robots are
D
So clever are the construction robots