________ the police thought he was the most likely one，since they had no exact proof about it，they could not arrest him.

 I saw some trees the leaves of _____ were black with disease. 

The view ______ many scientists hold is ______ too much emission of carbon dioxide is destructive.

The traveler lost his way in the woods, and       made things worse was that it was getting dark.

They are discussing in the next room_______will go to the conference on behalf of the manager.