It was ____ the old worker came that we ____ the experiment.
–________ he made up his mind to take a trip to Europe? –Last week when he got an unexpected reward.
–Can you come on Monday? –No, I am_______.
Anything _____ could be found has been used to repair the damaged bridge.
Here is my classmate _____ bicycle was lost yesterday.
_____ seemed as if nobody knew anything about the matter.