—Is there anything wrong, Bob? You look sad.—Oh, nothing much. In fact, I __________ of my friends back home.
“You” _____ a very useful word in English.
_____ were nice to me when I was in the United States.
The population of city________ larger than that of any other city in the country.
Nothing except some chairs _____ there.
Many sheep _______ eating grass by the river.