【題目】Researchers have been determined to ______ how bird flu spreads from human to human worldwide.

A. turn out B. figure out

C. pick out D. check out

【答案】B

【解析】考查詞組辨析。句意：研究人員已經(jīng)下定決心要弄清楚禽流感是怎樣在世界范圍內(nèi)在人與人之 間傳播的。A. turn out“證明是；結(jié)果是”；B. figure out“弄清楚”；C. pick out“挑選出”；D. check out“結(jié) 賬離開”。故選B。

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