The meeting________by the time I got there yesterday.
---- Be quick. I can’t wait _________.---- OK. I’m coming.
I will never forget that terrible accident _______ it happened so long ago.
---- I think science is more useful than art.---- I disagree. I think art is _________ science.
---- Do you know how to prevent the A/H1N1 flu?---- You can ask the doctor for some ________.
The students enjoy Miss Yang’s classes because she’s a teacher with rich teaching _________.