Many countries are increasing their use of natural gas, wind and other forms of ______.

Their products enjoy 30 percent ________ of the market in this country because both the quality and their service are fine. 

Lina didn’t get there on time because of the bad weather, what’s more, her car was in poor          .

Teachers have to constantly update their knowledge in order to maintain their professional(专业的)_______.

It is a great       for a person to be able to drive when he is seeking a job.