I thought she was African, but ______ she’s Spanish.

They were so late that they ____had time to catch the train.

We often say that something is “as light as air”, but air is＿＿＿light. 

Running a company is not ______ a matter of hiring people—they also need to be trained.

The committee is discussing the problem right now. It will_____ have been solved by the end of next week.