At a rough estimate(估计), Nigeria is ____ Great Britain.
—Nancy, can you help me type this report, please? —_______I have a lot of work to do.
Is this the recorder you want________?
He set out early after supper_________ be late for the film.
You’d better put things back______. Otherwise, it will be difficult to find them.
It is_____the pupils do in their spare time_____ really______ them to take their place in society as citizens when they grow up.