Exercise 1 on p721. According to some scientists, global warming _________________ the survial of the whole human race.2. The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relativley small (19%) , and exceeded the number of overseas visitors (16%) ________________.3. The early Spaniards established a chain of missions to ____________ the local population along the San Antnio River.4. It was common practice then that when the store owners wanted to go on vacation they simly ______________.5. As they didn't have relatives or friends there they often _____________ around nearby malls when they got bored.6. To make a birthday card, you can simply cut out some funny or pretty pictures from magazines, ______________ them onto a piece of card and then write your message inside.7. She picked up the receivers and, __________ asking the caller to hold on, went off to tell Jack that he was wanted on the phone.8. To relax himself for a little while, he rose from the computer desk, walked across the room towards the window and stretched both arms upwards and ___________.9. The new product has a pair of small loudspeakers fitted inside, which you can easily _______________ your computer's sound card.10. Music in fact is a _____________ language of a non-verbal nature which is rich in expression.11. This ________________ is designed to show at a glance how many rooms have been rented out and how many are still available.12. ________________glorious sunshine, the boundless stretch of corn fields looked an impressive sight.