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
2. has stopped
3. invented
4. haven't finished
5. has taken it!
6. Have you lost anything?
7. bought
8 didI've done it