3．Researchers have been determined to ______ how bird flu spreads from human to human worldwide．（　　）
A．turn outB．figure outC．pick outD．check out

分析 研究人員決定要找出禽流感是如何在世界范圍內(nèi)進行人與人之間傳播的．

解答 答案：B．
turn out結(jié)果是，證明是，figure out找出，算出；pick out挑選出；check out檢驗，校驗，結(jié)賬．根據(jù)句意"要找出禽流感是如何在世界范圍內(nèi)進行人與人之間傳播的"可知，只有figure out與此相吻合；故選B．

點評 動詞短語的意思要弄明白，并結(jié)合句意和句子之間的邏輯關(guān)系進行分析，選出正確答案．

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