We have to start at 7：15 tomorrow mornin...

We have to start at 7：15 tomorrow morning， _____ we will be late for the 9：40 plane.

A．or B．so C．if D．before

A 【解析】试题分析：句意为：明天早上7：15我们必须启程，否则我们会误了9：40的航班。or：或者、否则，so：因此，if：如果、是否，before：在……之前。根据语境可知，这里指的是“否则”，故应选A。考点：考查连词的用法。

考点分析：

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