The size of the audience, ____ we had expected, was well over one thousand.
Though they met for the first time, they talked __________ they were good friends.
The medicine works more effectively __________ you drink some hot water after taking it.
It will be a long time __________ we finally solve the problem of pollution.
It was five o'clock in the afternoon __________ they climbed up to the top of the mountain.
—Did you remember to give Tom the book you borrowed from him? —Yes, I gave it to him __________ I saw him.