Nearly________ of the surface of our planet is covered by water.
Hurry up, _______ you will miss the early bus.
---Shall we meet at 6:00 or 7:00? ---________.
Many people claim that they have seen UFO with their own eyes, _____ I personally doubt.
—You _____ a meal this evening. I had dinner at a restaurant with Tom. —Well, why didn’t you phone me and let me know?
Water, which seems so simple and common, is _____ makes life possible.