Once_____, everyone taking the examination will be given test papers [ ]

Consumers are getting more sensible and buy onlythey need in spite of all the advertisements they see.

Which dress do you like best, Madam— Sorry. I can’t decide ___________ now.

If we use the new recycling method, a large number of trees

I’m not sure if it _________tomorrow。If it __________ ,we won’t climb the South Hill.