Sir, you are not allowed to enter the building unless you get our manager’s__.

The Committee had met many times, but had not come up with __________ to the problem.

I like __      a lot, and my mother usually cooks it in different ways. 

 At the meeting they discussed three different     to solving the problem.

Urban (城市) crowdedness would be greatly relieved if only the_______ charged on public transport were more reasonable.