专四

单选题 You should know better than__________your little sister at home by herself.

A.to leave
B.1eaving
C.to have left
D.1eft

参考答案:A进入在线模考
A。你应该知道,不该把你妹妹一个人留在家里。
考查惯用表达。to know better than to do sth.是一个常见的表示责备的结构,意为“应该知道不该做某事”,故选A。