公共英语一级

单选题We can always change the dates of Our trip，__________it’s necessary．

A．if
B．though
C．or

参考答案：A进入在线模考
句意：如果必要的话，我们可以改变旅行日期。本题考查的是if引导的条件句，表示假设。though引导让步状语从句，or表示“或者”，都不符合句意。故选A。
【知识扩展】If it is necessary…表示“如果…必要的话”。

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