On no account ____ ever leave the baby at home alone.
A
【句意】你决不应该把小孩一个人放在家里。
【难点】onnoaccount意为“决不”属否定意义的词，引导倒装句，所以只有A)项正确。
—Haveyoufinishedthework?
—Notyet,butnomatterhowharditis,we'llkeep___untilwemakeit.
Thereis______littleinformationabouthimthatwehave______muchdifficultyfindinghim.