Answer:
1. The information must be given by the speaker but an active involvement from the listener is essential.
2. Newton watched an apple fall from a tree and wondered why it moved to the earth.
3. We lived in this house for eight years and in this town from 2007.
4. If you reach before the sunset, then you may get a chance to see it while sitting by the lake.
5. The crisis of drinking water is deepening because of the drying up of water resources and lowering of groundwater through over-pumping.
