Professor Tang didn't give us a speech today.It was ________ he had a traffic accident on the way to school.
Supposing you _________ the lottery, what would you do with the money?
Children’s brains cannot develop properly _________ they lack protein.
We all write ____________ even when there's not much to say.
Experts and teachers all think that failure is not __________ a bad thing to some extent.
---What do you think about the measures taken to prevent _________ global warming?--- On __________ whole, they are good.