The fire spread through the hotel very quickly but everyone ____ get out .
Bacteria do not develop at low temperature, so that food can be _______ in cold storage.
These pictures _______ us of the happy days which we spent together on the campus.
They have always treated us with open hands and we must be generous ________.
—All the building materials have been washed away.—So I have heard. But there was no sign ____ a heavy rain was on the way last night.
—It is _______he often fails in exams_______ makes his parents worried about him.—So, he has to work whole-heartedly.