Where____ he ____ for his next vacation?
—Which is______,the sun,the moon or the earth? —Of course,the moon is.
I bought ______ for my son,but ______ for myself.
—______ you in America in 1999? —Yes, I ____________.
—______ does your mother go for a walk? —Every afternoon.
—I could look after when I was five. —Really?I can’t believe it.