Короткие предложения со словами (на ): show,discover,challenge,explain,prove.

1)Today show new film
2)It was discovered by the British exploler Jams Cook in 1770 (открыл континент Австралия)
3)At the lesson explains new topic
4)Scientists have proved that there is life in outer space
5)Since I 'm on a diet
6)Answer quickly , clearly and understandably
7)We present new technologies for the future
8)They were surprised when they saw me dance
9)My body is developing every day

как-то так