32. If the economic situation goes on like this, there’s a danger______ many factories may have to close down.
She took it for granted _________ I'd be back home an hour later.
_________ caused the accident is still a complete mystery.
It is widely _________ that smoking can cause cancer.
_________ appeared to me that he enjoyed the food very much.
_________ all the inventions have in common is _________ they have succeeded.