单项选择题

Since pollution became a concern in the 1950s, experts have predicted wrongly that the car ______ was about to end.

A．boost
B．boom
C．production
D．prosperity
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单项选择题
Several international events in the early 1990s seem likely to ______, or at least weaken, the trends that emerged in the 1980s.
A．retrieve
B．revolve
C．reverse
D．revive
单项选择题
He was totally ______ by the clues to the crossword puzzle.
A．degraded
B．evoked
C．bewildered
D．diverted
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