英语语法填空题答:1 have, borrowed 2 travels 3 have, done 4 has, written 5 have visited 6 haven't seen 7 Has, stepped 8 was looking, began 9 haven't seen, finished 10 has been working, has worked, will work 11 cooked, was reading 12 saw, flying 13 Have, visited, have 14 hasn't ...