John was about to go back to sleep ______ suddenly his bedroom became as bright as day．
A．after B．when C．while D．until
If you smoke a cigarette every day, you will _____ become addicted to smoking．
A．deliberately B．automatically
C．particularly D．technically
_____ I have a dream to become a singer,I don't have a gift for music．
A．As long as B．Now that
C．Even though D．In case
_____ the absence of the manager, we were unable to decide on the date of the celebration．
A．In spite of B．On behalf of
C．Due to D．Regardless of
_____ in the queue for half an hour, Tom suddenly realised that he had left his wallet at home．
A．To wait B．Have waited
C．To have waited D．Having waited
This ______ my first lime standing in front of so many people, I can't help sweating．
A．being B．is C．was D．has been
