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
Everything happened to be messy with the dangerous plan.
A. in order
B. out of order
C. in place
D. out of breath
单项选择题
The colors in these artificial flowers are sure not to vanish.
A. disappear
B. appear
C. figure
D. blend
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