—Zhang Lei, do you have _______ soccer ball?—Yes, I do.
—There is not much difference between the two watches. I don’t know ______. Do you have any suggestions? —I don’t know , _____.
By the time I was nine ,I ______hundreds of English words.
—Wang Wei, what are you doing ? —I’m reading ______.
I know the young man in green jacket ____brother is my good friend.
—Physics is an important subject, isn’t it ? —Yes. ________it well and you’ll find it useful in your daily life.