单项选择题

Baby-sitters paid at the ______ of 4 dollars per hour.

A. rate
B. price
C. scale

D. standard
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It’s time for us to ______ the traditional Chinese architecture.
A. preserve

B. reserve
C. conserve

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______ that John would become a well-know statesman.
A. A little we thought

B. Little we thought
C. Little did we think

D. A little did we think
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