It was not until he arrived at the office_____ realized he had forgotten the key.

A survey was conducted in Shanghai ____________ interviewees were asked if they wanted to be a factory worker.

I was about to go to bed _____ one of my old classmates made a call to me.

—Driving after drinking alcohol should be punished, I think.
—Sure, it is several months________ the ban came to effect in the whole country.  

. Will you pass me the dictionary _____ the cover is dark blue?

_____the girl could rush out of the house, the roof fell upon her.

—You seem to have had that car for years.  
---Yes, I should sell it ____ it still runs.

It was___he said___disappointed me.?

— Why didn’t you try to finish the composition?
— I tried to , but        I could, the bell rang announcing the end of the examination time.

Meeting my uncle after all these years was an unforgettable moment, _____ I will always treasure.