Look at the diagrams.Complete the Text. ​

1.past simple
 a) present simple
b)past simple
c)present perfect
2.present simple
a)past simple
b)present perfect
c)past simple
3.past simple
a)cкорее всего past simple
b)past simple
c)present perfect
4.present simple
a)past simple
b)present perfect
c)dont know

present simple - настоящее простое время, то есть:
i am ...
простое время - 
did you ...?
present perfect - настоящее совершенное время - have you (had, eaten и тд)

делай по моему примеру, потому что это очень легко и за тебя не могут все делать, ты должн/а уметь это сама, в жизни это пригодится)

1 The Portuguese explorer Vasco da Gama had not seen penguins before he travelled to South  Africa in 1497. X

2 After he had made a pilgrimage to the city  of Mecca in 1325, Ibn Battuta decided to  become an explorer.

3 Many explorers had tried to climb Mount Everest  before Tenzing Norgay and Edmund Hillary  reached the peak in 1953. ✓

4 People in Europe had not eaten potatoes until  Christopher Columbus brought some from  America. X

5 More than 400 years after Magellan had sailed around the world, the US submarine Triton  made a similar journey underwater​ .

Объяснение: вроде правильно