1 student---students
2 are---were
3 at 去掉
4 dinosaur's--dinosaurs'
5 for--by
6 the 去掉
7 laid --were laid
8 lived--have lived
9 before --for
10 对的
11 a --an
12 years
13 and--but
14 of--in
15 goes--went
16 like travel--like to travel
17 jim--jim's
18 cheap--cheaper
19 he --they
20 on 去掉
1 by--in
2 group--groups
3 one --a
4 the 去掉 (第一个)
5 spoken the first--spoken as the first
6 or--and
7 it--it's
8 the 去掉
9 language---languages
10 对的