I have no idea what they're going to say, so I'll have to play it by ear.
我一点不知道他们将会说些什么,所以我只好见机行事。
which I found most helpful on the cross-country journey, but which I did not think I should need on the last stage.
在乡间行车途中,我觉得它非常有用,但快到家了,我倒觉得它没什么用了。