It can’t be a (n) ______ that four jewelry stores were robbed in one night.
So _____ that modern industry cannot develop without it.
I feel it an honor ______ to speak here.
Scarcely _____ raining _____ the PLA fighters started on their way again.
He ______ English for six years by the time he takes his examination.
Never _____ forget the days when _____ together with you.