一、
I lost a gold ring while I was digging in the garden.I searched everywhere and did not find it.I dug up the garden and found a valuable old coin instead.
二.
1.My car had a loud explosion and stopped.
2.I got out to have a look at the engine.
3.A man who was driving a large modern car passed me.
4.I waved to him but he did not stop.
5.I passed the large car later when the man was changing a wheel.