【Themurdererrefusedtocomeout,sothepolicehadnochoicebut________.A.forcedopenthedoorB.toforcethedooropenC.forcethedooropenD.breakingintothehouse】

问题：【Themurdererrefusedtocomeout,sothepolicehadnochoicebut________.A.forcedopenthedoorB.toforcethedooropenC.forcethedooropenD.breakingintothehouse】

答案：↓↓↓

接道良的回答：

网友采纳　　答案B　　but作介词,其后可跟不定式.but前有实义动词do,其后的不定式不带to；but前无实义动词do,其后的不定式应带to,答案为B.　　试比较：　　LasteveningIdidnothingbutwatchTV．　　昨晚我除了看电视,没有做其他的事情.　　Theydidnothingbutcomplain．他们啥也不做只会抱怨.　　Andithasnochoicebuttoliedownandsleep．　　于是它别无选择,只能躺下睡眠."