Choose the correct option.

1) ... Alaska is the largest state in ... USA.
2) ... Amazon crosses three countries in ... South America.
3) ... Mount Everest grows 4 millimetres ... year.
4) This is the museum ... you can see paintings by Van Gogh.
5) We met a tour guide ... showed us around the city.
6) I ... visit Mexico next summer.
7) I will ... go to Spain next year.
8) If I ... you, I'd travel to Greece this summer.
9) If you ... ice in water, it floats.
10) If I ... to London, I will visit many interesting places.