---Why does the boy bring a chair here?---Because the bookshelf(书架) is half a metre __________ his head. He has to stand on it to get the books on it.
They ______ go out for dinner, but not very often.
Nobody taught me English . I learned it by _______ .
I feel my stomach terrible. I think I ate ______ at lunch time.
—________do you read English books? —Twice a day.
I have quite ______ friends. I feel very happy.