Look at the sign! It says “No Smoking!” You ________ smoke here. It’s dangerous.
You will have a better chance _____ passing your exams if you work harder.
— Where is your father now?— I’m not sure. He be in the kitchen.
It’s difficult to live in a foreign country, if you can’t speak foreign languages.
—Can you finish the work in an hour?—____________.
There are ________ books in the National Library.