---I went to see my friends off at the airport.---Is that_____you were late for the important meeting?
______ twice, the postman refused to deliver our letters unless we chained our dog.
The medical team ____ five doctors and ten nurses is to be sent to Wenchuan.
The Internet is widely used, which ____ the development of English.
Tom received an invitation to dinner, and with his work ____, he gladly accepted it.
Her mother does not _____ of her going to study in the United States alone.