The traffic problem we are looking forward to seeing _____ should have attracted the local government’s attention.

We should take ______of this opportunity to make a good impression on them.

Many people cut down their daily spending in order to ____ the financial crisis(金融危机). 

At the meeting they discussed three different _____ to the study of maths.

 The carpet where he _____was warm and comfortable, so he slept soundly.