1.

You ought

    to check

the weather.

2.

You should never

  leave

cash in your hotel room.

3.

You need

  to take

your credit card with you.

4.

You have

  to pay

an airport tax.

5.

You should

  let

your family know your hotel phone number.

6.

You'd better not

  go

out alone late at night.

7.

You must

  get

a vaccination if you go to some countries.