Do you want ________ an apple?

Anyang is a famous city ____has a long history and rich culture .—I hope I can visit it some day in the future .

Tom. Why do you look so tired? — Because I often study late ______ 10 o’clock at night.[ ]

There is ______ “f” and ______”u” in the word “four”.

Is this ______ English book?—No. ______ is at home.