13. Every time the father comes into his room, the boy pretends ______ earnestly.
_______ happened that I met one of my friends yesterday.
It _______ that she has lost interest in studying English.
________ is a pity that you forgot both her address and her telephone number.
How many years is it ______ your family moved here?
It won’t be long _____ the island ________ to our motherland.