Miss Liu, do you have any ideas about Jiuzhaigou _______ we will play together this summer holidays?
—Who read the new book?Please tell me something about it.
—Have they finished the work? —Not .
—What do you our new car? —I think it is beautiful.
—Have you ever written a letter to your friend? —Yes, I.
—Have you received the books which ______ online? —Not yet.