I will phone Bahar as soon as I ______________ any news.

It is now_______________ expensive to repair the damage which has been done.

Although the telescope_____________ into space in 1990, its inception was almost a half-century earlier.

________ the importance of zoos as tourist attractions, until recently there has been little research to investigate the nature, attitudes and motivations of zoo visitors.

When Rupak entered the class, the lecture_____ , so he found it hard to follow.