单项选择题

A strike is usually resorted to only when less __________ measures fail.

A．watertight
B．drastic
C．prevalent
D．adverse
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单项选择题
The fashion designs this year show a great deal of __________, especially in the attempts to use new materials.
A．fascination
B．enlightenment
C．contention
D．originality
单项选择题
Genetic engineering and cloning technology __________ in meaning.
A．overlap
B．overflow
C．prolong
D．collide
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