Mr．Howesaid，“Isyourpartygoingtostartat7？”Mr．Howeasked________ourpartywas

Mr．Howe said，“Is your party going to start at 7？”Mr．Howe asked________our party was going to start at 7．A.thatB.ifC.whenD.weather

B解析分析：直接引语是一般疑问句的话，改为间接引语时用if或whether(都解释为“是否”)引出的宾语从句。D项的weather发音和whether是相同的，但意思是“天气”。(延伸)if可以引出两种类型的从句，必须区分：引出“条件状语从句时，意思是“如果”，从句中要用一般现在时表示将来；引出宾语从句时，意思是“是否”(大多数情况下可以和whether换用)，从句中没有用一般现在时表示将来的用法，该用什么时态就用什么时态，如：I don't know if he will come tomorrow．(“是否”，从句中用一般将来时)I will tell him about this if he comes tomorrow．(“如果”，从句中用一般现在时)(延伸)解释为“是否”时，if和whether的异同：1)引出宾语从句时大多数情况下通用，如果紧接or not时只能用whether，如：Mr．Howe asked if(或whether)our party was going to start at 7．／Mr．Howe asked whether or not our party was going to start at 7．(只能用whether)／Mr．Howe asked whether(或if)our party was going to start at 7 or not．2)不是引出宾语从句，解释为“是否”，只能用whether，如：I don't know whether to go there．(跟的是动词不定式，不能用if)，解释为“如果”，只能用if．

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