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

______ with so many challenges, Yang Guang, a blind young fellow, didn’t give up; he made great efforts to win success.

Anyone who has spent time with children is aware of the difference in the way the boys and girls response to       situations . 

David felt ________of the foolish thing he had done in the classroom.

-What do you think of the party?---It is, of course, ___.