A decline in electricity output forces industrial estates and cities to burn more coal and give out more carbon to _________ the shortfall.
—What do you think of his opinion? —None has given me ___________ piece of advice.
The visiting professor gave us some advice,________ of great help to our English learning.
Nine in ten high school students say there are significant differences in their attitude toward chatting on line, compared with _________ of their parents.
Do you think that bridge ____ 2,000 meters long? It doesn’t seem ____ long.
We now live in ____ is called the Information Age.