单项选择题

Poor health and lack of money may be both to educational progress roadblocks.

A. restraints

B. stains
C. scarcities

D. barriers
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单项选择题
Philip Roth was hailed as a major new author in 1960.
A. published
B. challenged
C. acclaimed
D. guided
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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