---- There is a lot of smoke coming out of the teaching-building there.---- Really? It _____ be a fire, most probably.
The factory ______we'll visit next week is not far from here.
That is the day ______I'll never forget.
It there anyone in your class ______family is in the country?
I'm interested in ______you have said.
.I want to use the same dictionary ______was used yesterday.