That such a great number of families are still so badly off greatly ______ the researchers.
A．puzzleB．confuse C．disturb edD．a(chǎn)stonishes
D

這題考查動(dòng)詞詞義辨析：A. puzzle使…困惑，B. confuse使…迷惑，   C. disturb打擾，      D. astonishes使…驚訝，句意是：這么多的家庭還這么貧困讓研究人員很驚訝。選D。
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