(2013·江西，24)What a terrible experience！________，you're safe now—that's the main thing.

At first, we didn't know about Tom. But ____, we came to know that he was an honest boy.

I sincerely regret that I have hurt your feelings, but I didn’t do it ______.

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

. ______we’ll be able to drive a car______ by electricity, solar energy in about ten years.