We’ve published large quantities of books. This year______ we’ve published three million copies.

“If you’re walking down the right path and you’re willing to keep walking,_____ you’ll make progress”, said the president Obama.

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

On snowy days, you have to drive very ________ to avoid traffic accident.

As he works in a remote area, he visits his parents only__________.