问题 选择题

______ he has made up his mind, no one can make him change it.

A.Unless

B.Once

C.Until

D.As

答案

答案:B

题目分析:考查连词辨析。A除非;B一旦;C直到…才;D当…时;句意:一旦他下定了决心,就没有人能让他改变。故B正确。

点评:连词的辨析也要放在上下文中进行,要注意unless用法,要把它改成if…not…便于理解。

单项选择题
名词解释