【題目】Some scientists don't deny the existence of aliens ,but further evidence is still needed to _____ it.

A. compromise B. confirm

C. commit D. concern

【答案】B

【解析】考查動詞辨析。A. compromise妥協(xié)；B. confirm確認(rèn)，證實；C. commit犯罪，指派； D. concern涉及，關(guān)心。句意：一些科學(xué)家并不否認(rèn)外星人的存在，但是進(jìn)一步的證據(jù)仍需證實。表示證實證據(jù)，故選B.

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