— Why do English people talk so often about the weather when they start a conversation?— Well, it’s probably the weather is a(n) __________topic.
—I heard that they went skiing in the mountains last winter. —It ________ true because there was little snow there.
—Who is the girl standing over there? —Well, if you ________ know, her name is Mabel.
You and I could hardly work together,________?
—It’s the office! So you ________ know eating is not allowed here. —Oh, sorry.
What do you mean, there are only ten tickets? There ________ be twelve.