If time travel was possible, people could meet
characters from the past. / people from the past
wouldn't understand us.
If robots did all the work,
2
3
If we didn't have the Internet,
4 If teleportation was possible,
5
If there was life on other planets,
6 If we could communicate with animals,
1. not as big as \ bigger
2.tall
3.the best
4.the more, the merrier
5.good
6.farther
7.further
8.the worst
9.the coolest
10.as clever as или cleverer\mote clever -оба варианта употребительны
11.very last
12.elder
13.тут little использовать некорректно, так как little применяется по отношению к неисчисляемым существительным, лучше few - с исчисляемыми, так как речь идет об игрушках - fewer
14.much
15.the saddest
16.dirtier
17.the most interesting, тут неправильно построена первая часть предложения, нет глагола
18.the shiest\the shyest - возможны оба варианта
19.better and better
20.prettier
21.better
22.older, more beautiful
23.difficult
24.darker and darker
25.stronger