Question

______ he has made a decision, it is not easy for you to make him change his mind. A．Though ..

______ he has made a decision, it is not easy for you to make him change his mind. A．Though B．Unless C．Until D．Once

Answer 1

D
试题分析：连词辨析。A尽管；B除非，如果…不…；C直到…才；D一旦；句意：一旦他做出了决定，对你来说让他改变主意是很不容易的。根据句意说明D正确。
点评：对于连词的辨析要放在上下文语境中进行，本题的B项是考查的重点，要注意unless可以换成if…not的结构。