Hi, Are two " up's" allowed side by side? Grammatically, I don't see a problem. Please guide me.
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I have always thought fog only builds up up to a certain height.
Which one the two you find correct? I suppose #1.
1: I see, fog is building up. We should hurry before it's all covered.
2: I see, fog is building. We should hurry before it's all covered.
You can only climb only up to a certain height because