As a result of destroying the forests, large ____ of desert ____ covered the land.

----Mike, what did your monitor say just now? ----Every boy and every girl as well as teachers who      to visit the museum      asked to be at the school gate before 6:30.

We collected a lot of books to get the necessary information but only half _________helpful, so we failed to finish the work. 

We think that _______ more vegetables _______ good for us.

East of our city ______ a world-famous pagoda dating from Tang Dynasty.