22．However, at times this balance in nature is , resulting in a number of possibly foreseen ef——青夏教育精英家教网——

摘要：22．However, at times this balance in nature is , resulting in a number of possibly foreseen effects． A．troubled B．puzzled C．mixed D．disturbed

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However, at times this balance in nature is __________, resulting in a number of possibly foreseen effects.

A.　　 troubled 　　　　　　　　　　　　

B.　　 puzzled

C.　　 mixed　　　　　　　　　　　　　　　　

D.　　 disturbed

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However, at times this balance in nature is __________, resulting in a number of possibly foreseen effects.

A.　　 troubled 　　　　　　　　　　　　

B.　　 puzzled

C.　　 mixed　　　　　　　　　　　　　　　　

D.　　 disturbed

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However, at times this balance of _____ nature is _____, resulting in a number of possibly ___ effects.

A．the; troubled; foreseen B．X; puzzled; unforeseen

C．X; mixed; foreseen D．X; disturbed; foreseen

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