1. His collection of paintings ARE valuable and rare.
2. The flight of the stair to the temple IS under repair.
3. The internet PROVIDES a wealth of information for the users.
4. A fleet of antique cars PASS by the road every Sunday morning.
5. This string of pearls COSTS a lot of money.
The 2nd and 4th one due to the fact it doesn't give a valid reason but more of an effect of doing so.
His own experiment. Answer:
Explanation:
