I will explain to them _______ we are planning to do on Sunday.
A huge fire ______ last night and many houses were burnt down.
Mike’s never willing to change any of his opinions. It’s no use ______ with him.
The organization was founded (建立) for the ________ of poor children .
People try to save time by using their own cars, and this ________ creates further problems.
I was about to leave_______ something happened, which attracted my attention.