John’s ability to learn from observations and experience _______ greatly to his success in public life.
His glasses, _____he was like a blind man, were broken.
Experiments of this kind in both the U.S.and Europe well before the Second World War.
So _____ in the darkness that he didn’t dare to move an inch.
-- Are you going to participate in the speech contest?-- ____ How wonderful an opportunity!
____ to Anne's birthday party. Mr. Brown is now searching shop after shop for a nice present for her,