There is ______ thing as a free lunch.
Progress __________ so far very good and we are sure that the work will be finished on time.
For many years, people __________ electric cars. However, making them has been more difficult than predicted.
—I'm sorry, but I don't quite follow you. Did you say you wanted to return on September 20?—Sorry, I __________ myself clear. We want to return on October 20.
I have to see the doctor because I __________ a lot lately.
When you are home, give a call to let me know you __________ safely.