You should look _______ into the matter to get more information about it.

Everybody said it was a perfect marriage; no one had ever known________couple.

Ten years have passed and I’m glad to find that the local villagers are now much______ than they were before.    

The audience waited in________silence while their aged speaker searched among his notes for the figures he could not remember.

 Jim isn't _____, but he did badly in the final exams last semester.