Upon reading the notice all the staff of the company stood there        ,  looking     at each other. 

As economy worsened, jobs ______ to the laid-off workers continued to be scarce． 

It was ______ of you not to give others a ride in your new car.

Scientists are increasely _____ that the earth is getting hotter because of carbon dioxide and other gases.

The ______ look on the manager’s face suggested that he _______ to overcome the difficulty.