Question

______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.

A．What; whose

B．What; whom

C．It; whose

D．As; whom

Answer 1

B

試題分析：通過分析句子結(jié)構(gòu)，可知這個句子中包含一個主語從句，和一個非限制性定語從句。且引導詞在主語從句中作主語，表示“什么”的含義，故用what。介詞 + 關(guān)系代詞引導的定語從句，指人只能用whom。
點評：解答這類題，首先要確定從句是什么從句，然后依據(jù)相應的語法規(guī)則答題。名詞性從句中引導詞的確定，要看它在名詞從句中作什么成分，有什么實際意義。定語從句中關(guān)系詞的確定，要看它在定語從句中作什么成分。當引導詞在定語從句中作介詞的賓語時，往往可以把介詞放在關(guān)系代詞之前，構(gòu)成“介詞 + 關(guān)系代詞（whom / which）”結(jié)構(gòu)。做這類考題時，有以下三個注意事項。1. “介詞 + 關(guān)系代詞”引導定語從句時，關(guān)系代詞只有whom（指人），which（指物）和whose（表所有）。注意不能用who或that，關(guān)系代詞也不可省略。如：Do you know the girl with whom the English teacher talked just now? 
你認識剛才跟英語老師談話的那個女孩兒嗎？2. 關(guān)系副詞可以用“介詞 + 關(guān)系代詞”來替換。其中，when =" at" / in / on + which; where =" at" / in / on + which; why =" for" which；而關(guān)系代詞whose常可用“of + which / whom”來替換。如：The house whose doors are green is an office building. =" The" house of which the doors are green is an office building. 門是綠色的那座房子是辦公樓。 3. 含有固定搭配的動詞短語，由于其關(guān)系緊密，不宜拆分，所以不能將介詞置于關(guān)系代詞之前。這類動詞短語有 look after, take care of, listen to, look at, look into, come across, look forward to, break into等。