— I wonder if I could use your mobile phone. — ____.
It is ______ that terrorism is a great threat to world peace.
With the worldwide oil crisis, the price of oil has been raised ______ 15%.
Part of the work is to be finished today and ______ by this weekend.
It is no longer a problem _______ the poor children in this district can go to school.
We need a more capable leader, ______ with strong will and as well as good humour.