______ the worker’s working efficiency, the manager will allow him to have a coffee break.

It is said that the Olympic Games ______ in London in 2012 will cover more events than any other Olympics did.

A young man practised ______ English with Mr Green.　

–The weather is getting warmer. I hope the children won’t go onto the ice.
--I warned them_____.

Do you have any difficulty ________?

When he borrowed the camera last time, he broke it and I had to pay to get it _______.

When ______from top of the hill, our school looks small.

In the past month, cruel snowstorms hit some European countries and America ,    great transportation problems in these countries.

Tom always prefers _________on foot rather than _______ a bike.

___ people food, jobs, housing, justice, compassion and equality is what a government should first consider after a natural disaster strikes．