单项选择题

Cement was seldom used in building the Middle Ages.()

A. crudely
B. rarely
C. originally
D. occasionally

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单项选择题
This new policy has led to a dramatic increase in production.
A. minor
B. striking
C. fixed
D. modest
单项选择题
These factors interact intimately and cannot be separated.
A. tensely
B. nearly
C. carefully
D. closely
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