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

------ This is such an interesting book ______ everyone likes to read .------Yes , but there are few such books _______ in the bookstore now .

Shanghai Expo has been building an Expo Village for the participants, but other choices will also be ____ if the Expo Village does not satisfy their needs．

What makes the space shuttle _____ is that it takes off like a rocket but lands like an airplane.

—What do you think of her performance?    —Wonderful．____heard a ____voice．