We'll have to wait a ________ two weeks to know the examination result.

I really appreciate that your help is of great _________. 

The situation forced my mother and I exchanged our roles as child and caretaker, making me grow up much faster than the _____ child.

John is taller than ____ in his brother Tom’s class.

 I tried hard to get some information about the new technology from him, but he remained ______.