---Which is ______, the sun, the moon or the earth?   ---Of course the sun is.

“'m going to do it,” she said ________.

I usually get home late because there is ______ traffic on the road.　　  

___ do you like the book?---  Because it is interesting.

----Peter has good grades in all his subjects, but he never shows off.----I agree. He is very ________.