单项选择题

Studies show that most adopted children want to know who their ______ parents are.

A．natural
B．first
C．primitive
D．original
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单项选择题
I can't drink______.
A．as sweet coffee as this
B．sweet coffee as this
C．as sweet as this coffee
D．the coffee as sweet as this
单项选择题
The little boy demonstrated a remarkable ______ ability; his calculation with figures was faster and more accurate than any one of us here.
A．numeral
B．numerical
C．numerous
D．numerable
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