If there is a lot of work _________．I’m happy to just keep on until it is finished．

　　A．to do　 　　　　　　　　B．to be doing

　　C．done　　　　　　　　　　D．doing

A.


解析:

此處to do在句中做定語修飾work，本句的意思是：如果有很多工作要做，我很樂意一直把它做完。不定式做定語往往表示未發(fā)生的動(dòng)作，放在被修飾詞的名詞、代詞后。

　

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