The engineers made two big plans for the dam, ____ was never put in force.
Tell me when you ______ at the airport, Alice. I’ll go there to meet you if I’m free.
Great changes have taken place in the city ______.
It was the second time that we ______ in holding such important parties.
She opened her eyes and was about to cry out ______ she heard her father urgently telling her to keep quiet.
Let children speak their own opinions, ______they are different from your own.