题目内容
12．It is not immediately clear _______ the financial crisis will soon be over．（ ）| A． | since | B． | what | C． | when | D． | whether |
分析 金融危机是否可以很快结束尚不明朗．
解答 答案：D．根据It is not immediately clear 说明it 是形式主语，而真正主语 the financial crisis will soon be over可知句子完整，金融危机是否可以很快结束尚不明朗．，whether是否，故选D．
点评 本题考查主语从句的连接词，在充分分析it 形式主语的基础上再结合语义便能选出正确答案，同时要注意与it is clear that句型不要混淆．
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