1£®The conference has been held to discuss the effect of global warming __on__ the environment.

2£®It is __disturbing__(disturb) to think a dangerous wild animal is still at large in the quiet countryside.

3£®This new discovery of oil is of great __significance__(significant) to this area's economy.

4£®She is said __to_have_been__(be) an actress about twenty years ago.

5£®For your businesses to thrive in future, you need well qualified, creative, __motivated__(motivate) people.

6£®Learning a language is certainly __more__ than just memorizing words, phrases and structures.