If you’ve ______ those things that seem impossible，you will succeed finally．

From his ________ look, we could see that the professor hadn’t expected that we could raise such ________ questions to him.

The observer’s statement about the accident was very ; we know almost everything about it now.

She looks very happyShe_______have passedthe exam—I guess soIt’s not difficult after all

Putting in a new window will ______ cuttingaway part of the roof.