If you had arrived half an hour earlier, you _____ the well-known writer in the flesh.
---It was dangerous to throw that bottle out of the window. You could have hurt someone. ---I’m so sorry! I _______ .
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
---May I take this book out of the reading room? ---No, you______. You read it in here.
---We could invite John and Barbara to the Friday night party. ---Yes, _______? I’ll give them a call right now.
If you forget ______ your watch, it is likely to stop soon.