______ you are alone at home, why don’t you go with us to the party?
We appreciate ______ us know the change of the date for the meeting.
This is a picture of Dr. Yuan, a scientist ____ is well known in our country.
Only when I left my parents for Italy ________ how much I loved them.
There was _____ time _______ I hate to go to school.
.--- Robert, you didn’t travel by train? --- I was going to, but then I decided to go by car______.