选词填空（10分）Stay, far, carry, then, fall, do, leave, down, push, high A rain drop fell to the ground on the side of a hill. The rain drop ran 1 the hill into a small river. The small river 2 the rain drop to a big river. There the rain drop travelled 3 to the east and mixed itself with salt of the sea. The sun shone brightly. It warmed the water on the surface of the sea. Though the water became warm, some of it turned into water vapor. So 4 the water of the rain drop. The water vapor 5 the sea and went into the air. It do not car