Please _______to return mybook by Friday. I’ll use it on Saturday.—No, problem. I’ll finishreading it on Thursday.

What’s in the tree— ______.

It’s dangerous if you have the fire _____ all night long.

．一Daddy，look! Why_______ rainbow is like a bow一Oh，it is apologizing to________angry sky．

Zhang Xin，is there ________ university in the city—Yes. My good friend is studying in ________ university now.