—It is said that Jack is very rich and is always changing his private cars. What is he?—________, I am not sure.
I wish I _____a car.It would make life so much easier.
It was when I arrived home _____ I realized I had left my bag in the library.
You can complain, but I doubt _____ it’ll make any difference.
I won’t be able to answer any phone all the afternoon.I_____________ a conference.
The old couple have been married for 40 years and never once ___________ with each other.