__________ do you go to concerts? — It’s hard to say, maybe once a month. [ ]

After eight hours’ hard work, the firemen finally_________the forest fire.

Mary is the _________ child of her parents.

Oh! I came to school in such a hurry and forgot to bring any books with me. —Never mind. You can use ________.

One is never _____ old _____ learn. Do you think so?—Yes. I agree.[ ]