The big fire in Shanghai, believed to ________ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.

The houses of the rich are generally larger than _______of the poor.

It is obvious ______ the local government can do to protect the environment for the next generations.

I failed in the last exam and only then __________ the importance of studies.

y tried to stretch the shoes, but still his feet didn’t ___ them.