—It’s _________ useful dictionary and you can’t throw it away .   —Thank you . I didn’t know it before .                 

— Look! That’s Amy.  — It _______ be her. She’s gone to Xi’an.

They are ________ little kids ________ they should be looked after well.

—______ will you come back from Shanghai?    —In one month.

--_________ do you go to a movie?--Twice a week.