An ________ boy, Li Wen, works hard and gets good grades in his final exam.
eighteen-year-olds
eighteen-year-old
eighteen years old
The teacher asked the students to consider ________ another word instead of this one.
—Now that the problem is solved, why not have a break?—What nice ________!
Facebook is one of the most popular websites in Britain ___ over twenty-five million users.
—What does your brother look like ?—________.
—Tom works hard at English.—____, and _____.