单项选择题

These pollutants can be （）hundreds and eve thousands of kilometers by large air masses.

A. contained
B. conveyed
C. contaminated
D. conserved

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单项选择题

During the 19th century, Jews in most European countries achieved some equality of status with non-Jews. Nonetheless, at times Jews were harassed by anti-Semitic groups（）

A. opposed
B. exploited
C. despised
D. annoyed

单项选择题

Building this road will （）the construction of ten bridges, and then the total cost reaches I million US dollars.

A. evolve
B. involve
C. revolve
D. devolve

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