Unless the police can prove to the court that Ted has committed robbery,he______.

Mr. Smith as well as his wife and daughter, _____  to their school twice.

I first met John at my sister’s wedding. He _________ with the bridegroom at the time.

China's present environment situation is from bad to worse and if we _________ now to protect the environment, we’ll live to regret it. 

— Hello, I _______ to ask if I can book two tickets for tonight’s film.— Sorry, we’ve already sold out.