1.(I've started/I started school) when I was four
2.We can go outnow.Look! The rain (stoppped/has stopped)
3.An Englishman (invented/has invented) the World Wide Web in 1991
4.They aren't ready. They (didn't finish/haven't finished) their breakfast
5.Where's my bike? Someone (took/has taken)it!
6.What's the matter? (Have you lost/ Did you lose) something?
7.(I bought/I've bought) a tracksuit at the market last Saturday.
8.(I've done/I did) my homework. (I've done/ I did) it before dinner

1. I started school when I was four 2. We can go out now. Look! The rain has stopped. 3. An Englishman invented the World Wide Web in 1991. 4. They aren't ready. They haven't finished their breakfast 5. Where's my bike? Someone has taken it! 6. What's the matter? Have you lost something? 7. I bought a tracksuit at the market last Saturday. 8. I've done my homework. I did it before dinner.