1 i think explore the caves 

2 câu này mik chưa hiểu lắm 

3 câu này mik cx chưa hiểu

4 i and my family will swim in the sea 

5 they'll be at the seaside on sunday

6 she'll visit the islands on monday 

7where you will be on saturday

8 i think i and Mai will be at school 

9 the boys will be in the countryside next month 

10 i think i'll visit the mountains tomorrow 

11 we will go for a picnic in the countryside 

12they will be the seaside at next week

1. I think explore the caves

3. Phuong tuan and hoa may build sandcastles on the beach

4.My family and i will swim in the sea

5. they'll be on the seaside at sunday

6.she'll visit the island on monday

7. where will you be on saturday?

10. i think i'll visit the mountains tomorrow

11. we will in countryside for go the picnic