Tony showed me his new cell phone, _______ was small but it could change colors in different weather.
He hurried to the booking office only ___ that all the tickets had been sold out.
It was ___ he came back from school today ___ he found his new book missing.
--- I think I’m coming down with a bad cold. --- ___ .
We are lucky to be among the generation of people who have ________ and experienced the great social changes in our country.
The written record of our conversation doesn’t ______ what was actually said. There are a lot of mistakes.