---What are you searching the Internet for?---I'm trying to find out ________．A.what's difference between SARS and BIRDFLUB.how many persons have died in IraqC.how protect our environmentD.why isn't our Chinese team able to beat Korea
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B解析还是宾语从句的语序问题，首先可排除疑问语序的选项A和D；另外how不能和行为动词protect直接连用，一般可以这样使用：how to protect，所以选择how many persons have died…．