--- is the boy with Mr. Brown?--- He is Tim, one of my classmates.A. How B. Who C. What
—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.
This summer holiday I did an English course which ____ for four weeks.