—I _______ twelve.
—Hello! I____Mary.
— Yes, I____.
produce, improve, understand, retell, not dare
help with, be surprised that, be good for, so that, at least, because of, quite a few
swim, invite, mail, praise, borrow
—Yes, of course. He his signature (签名) football to us once in a while.
—Mom, he in the river with his friends.