This factory produces a million pairs of shoes every year, 80% are sold, abroad.
He’s worked there since the shop opened in 1998, _____ ?
She will have a holiday as soon as she _____ the work next week.
The world _____ . Things never stay the same.
Could you tell me when to get the book _____ I want to read?
The math problem is so hard. I really don’t know _____.