sfied______with the payment ,he took the job just to get some work experience

There are several theories about why dinosaurs suddenly died out, one of which says their disappearance _______ by the climate change.

When you finish reading the book, you will have _______ better understanding of ______ life.

At the back of the old temple__________ twelve huge stone statues together with __________ pagoda.

I saw him in the library yesterday. He______ a book at that moment.