(2013·高考北京卷)I have an appointment________Dr.Smith，but I need to change it.

One thing that most organically grown food products seem to have in common is that they cost more than ________ grown foods.

---Why do you pay a visit to your parents ________?---_______ they live in a remote village far from here.

We can get a lot of useful information on the Internet; ______, the Internet also provides us with a new way of communication.

It doesn’t make any difference how we get there because we’re going to be late________.