单项选择题

Many scientists ______the new damage to the forests to be the result of higher levels of pollution.

A．resumed
B．perfumed
C．presumed
D．consumed
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单项选择题
There's a______ in the fact that although we're living longer than ever before, people are more puzzled by health issues than they ever were.
A．analogy
B．paradox
C．dilemma
D．illusion
单项选择题
If negotiations fail, the workers will have to______ to strike action.
A．proceed
B．appeal
C．resort
D．incline
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