getting around. Vocabulary, grammar

When something costs a lot, it's --------------

When lots of people like something, it's------

When something makes a lot of noise, it's-------------

When something doesn't cost a lot, it's--------

When there are a lot of people in a place, it's-------

When something isn't safe, it's------------

My cousin's new flat is----- than mine

Barcelona is one of the -------cities in the world

Today is the ----------day of the summer

The-------way to get to the beach is by train.

The underground is--------in the mornings than in the afternoons.

Which is -----------expensive means of transport?