1 lead - led (I)
2 fight - fought (I)
3 explore - explored (R)
4 do - did (I)
5 win - won (I)
6 start - started (R)
7 discover - discovered (R)
8 build - built (I)
9 travel - travelled (R)
10 set out - set out (I)
11 die - died (I)
12 eat - ate (I)
13 bite - bit (I)
14 stab - stabbed (R)
15 come - came (I)
16 see - saw (I)
17 conquer - conquered (R)
18 be - was/were (I)
Ответ: see above