If the balance of nature is ____ , a series of problems will arise .
A．disturbed B．troubledC．interruptedD．confused
A
考查動詞辨析：A. disturbed打擾，打斷B. troubled困擾，麻煩C. interrupted打斷D. confused困惑，句意：如果自然的平衡被打亂，一系列問題就會出現(xiàn)。選A。
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