The doctors are ________ about the guidelines under which they can carry out euthanasia.
B
本题考查的是短语区分。A.不休息地，连续地;B.不知所措，茫然，不了解;C.任意的，随便的;D.最后，终于。句意：医生们不了解执行安乐死的准则。
______alittleearlier,Iwouldhavecaughtthetrain.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
AccordingtotheGrammar-TranslationMethod,Latingrammarwasconsideredtobethe______grammar.