.- The light in the office is still on. -Oh ,I forget____.
You must work hard,____ you will not learn English well.
____production up by 60%, the company has had another excellent year.
The book is not easy.____ it's rather difficult.
The number of the employees has grown from 1,000 to 1,200. This means it has risen ____20 percent.
He spoke loudly ____ the audience could hear him clearly.