16.eating 17. listening 18.buying 19.laughing 20. going II、
1. how to spend your holiday 2. to play with fire
3. to fly around the earth 4. to report his own story 5. to cross the road
6. to work out these difficult problems 7. work ten hours every day 8. what to say at the meeting 9. where to buy this book
10. When and where to hold the meeting
Ⅲ.1. to work 2. how to get 3. to have 4. to visit 5. to say 6. enough to carry 7. took, to do 8. to go to 9. seems to be 10. to listen to
实战演练（一）
1—5 BABCC 6---10 DCAAC 11---15 DABBB 16---20 DBBCA 21-25 BABAD 26---30 CCABD 31-35 BBAAC 36-40 DBAAD