Don't use water to put out the fire if oil catches fire. As is known, oil ________ float on water.
We were swimming in the lake ________ suddenly the storm started.
There were dirty marks on her trousers _________ she had wiped her hands.
. A modern city has been set up in _________ was a wasteland ten years ago.
. If Tim carries on working like that, he’ll _________ sooner or later.
What surprised me was not what he said but _________ he said it.