Проверьте, , правильно ли сделано (нужно было написать предложения во времени пресент перфект) и дописать последнее предложение если что-то не так, исправьте. заранее . this school year we have visited many interesting places. we have gone on a excursion of the museum this month. it been interesting because in the museum have been a lot of beautiful pictures that liked us. also museum guide have told very interesting history about these pictures. we have been happy with what have gone on this excursion and have learnt a lot. best of all

It was interesting in the museum because we have seen many

We were happy that we have gone on excursion and have learnt a lot

This school year we have visited many interesting places. - верно.
We have gone to the Excursion of the museum this month. - после глагола go только to 
It was interesting because there were a lot of beautiful pictures in the museum which we liked very much. - здесь не скажешь в Present Prefect
Also the museum guide has told us very interesting history about these famous pictures. - так тоже не говорят, но с точки зрения грамматики предложение построено верно.
We were happy because we have already gone to this excursion and have learnt a lot. - то же как и в предыдущем предложении, лучше было бы просто в Past, но раз задание только в Present Perfect, пусть будет так.
Best of all I liked waching the pictures which I have never seen before. - Больше всего мне понравилось рассматривать картины, которые я никогда не видела раньше.