单项选择题

Humans should not develop their economy at the ______ of the ecological environment.

A．destruction
B．pollution
C．expense
D．mercy
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单项选择题
______ flees if one is constantly subjected to demeaning orders.
A．Prime
B．Harassment
C．Conceit
D．Pride
单项选择题
Early exponents of science fiction such as Jules Verne and H. G. Wells explored with zest the future possibilities opened up to the optimistic imagination by modern technology.
A．inspiration
B．enthusiasm
C．fantasy
D．endeavour
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