1．What were you doing (do) this time last night?
2．The teacher told us that Lu Xun is (be) a great writer.
3．We are_doing (do) our homework now.
4．When I was (be) a child, I used to play the piano.
5．How many pages have you covered (cover) today?
6．This is what I have_been_expecting (expect) since my childhood.
7．Until then he had_known (know) nothing about it yet.
8．I won't speak to him unless he apologizes (apologize) to me.
