选词填空。 1. Where ____________ (do, does) the rain come from? 2. The sun ____________ (shine, shines) and the water ____________ (become, becomes) vapour. 3. Can you help me ____________ (go up, goes up) to the sky again? 4. First, we ____________ (has, have) the seed. 5. Wait for the flower ____________ (grow, to grow).