The number of the workers here ___ 200. Half of them ____under 30 years old.
There is ______ “b” and _______“s” in the word “bookcase”.
My mother’s ________are my brothers.
—________under the desk? -No, they aren’t.
—What’shername? —LilySmith .______isherfamilyname.
—Isthisyourwatch?---________.It’shiswatch.