Помогите! Надобно вставить верные варианты ответовPrague is the capital and the

Помогите! Надобно воткнуть верные варианты ответов

Prague is the capital and the __ city of the Czech Republic.
[12] 1) large 2) larger 3) largest 4) much larger

The Charles Bridge is filled with artist, painters and tourists. __ like this place in Prague.
[13] 1) their 2) they 3) them 4) themselves

You can easily get from any airport to the city center __ train.
[14] 1) on 2) by 3) at 4) in

I arrived in Moscow __ the morning and travelled by "Aeroexpress".
[15] 1) in 2) at 3) on 4) by

I did not pay the full price __ I got a discount
[16] 1) but 2) so 3) why 4) because