Complete the sentences with the correct form of the words in brackets.

1 Let's not go to the restaurant on Saturday, it will be. (crowd) and we'll never get a good table.

2 If you fail this exam, you'll have to. (take) it within two weeks.

3 Ironically enough, bright students often. (achieve) because the school does not motivate them enough.

4 Many people. (approve) of so much money being spent on space research when thousands are starving

5 In multicultural societies, people from different backgrounds have to. (exist).

6 Do you think people who've bought tickets for space voyages have been. (lead) as they're unlikely to ever travel into space?

7 I thought I saw a UFO, but before I found my camera to take a picture, it. (appear). ​.