V3, U1 be able to / have to

Lucie writes:

From the train, you (see) (a)   the scenery very well.

Lucie writes:

You (spend) (a)   a lot of money on food because you can bring your own.

Lucie writes:

There (be) (a)   enough room for your legs on the train.

Lucie writes:

You (sleep) (a)   well with the sound on the rails.

Lucie writes:

You (take) (a)   more bags than if you travel by air.

Lucie writes:

The trains are well heated and you (be) (a)   cold even if it's freezing outside.

Nick writes:

It (be) (a)   much quicker.

Nick writes:

You (pay) (a)   for any meals.

Nick writes:

You (see) (a)   your country from the sky.

Nick writes:

You (be) (a)   tired when you arrive.