He made another wonderful discovery, ______ of great importance to science.
It was _____ that I found my diamond necklace.
–I've passed the driving test! –I'm glad to hear that you _____ it at last!
Why didn't you make me a telephone call yesterday? I _____ about it.
–Do you know what Mike does all day? –I know he spends at least as much time watching TV as he _____ his lessons.
The blues _____ a way for people to show ______ they are and ______ is in their mind.