---- Does your brother study in Beijing University?---- No, not now. But he ________ there for 7 years.
After thirty years of separation, I _____ with my sister. How happy we were!
--- Have you seen the robber______? --- Why ask me? You are the only one who stands _____ to him.
Only when I left my parents for Italy _____ how much I loved them.
Some researchers believed that there is no doubt______ a cure for AIDS will be found.
--- I started off to walk, but Peter gave me a lift. --- Therefore, you _____ after all.