____some doubt among scientists about the cause of cancer.
Susan made______ clear to me that she wished to make a new life for herself.
-This apple pie is too sweet, don't you think so? -. I think it's just right, actually.
I don't really like the author,I have to admit his books are very exciting.
Writing out all the invitations by hand was more time-consuming than we______.
It was the middle of the night __ my father woke me up and told me to watch the football game.