page 240 ex. 1
2. a
3. a
4. an
5. an
6. a
7. a
8. an
9. an
10. an

page 241 ex. 3
1. the... the.
2. an... the. / an... the. / the. / a.
3. the. / a.
4. a. / a... an. / the./ the.

page 241 ex. 5
1. the
2. a
3. an
4. the
5. the
6. a
7. a
8. a
9. a
10. a
11. the
12. the
13. the
14. the
15. a
16. the

page 243 ex. 2
1. the
2. /
3. the
4. /
5. the
6. /
7. the
8. /
9. /
10. the
11. /
12. the
13. /
14. the
15. the
16. the

page 245 ex. 2
1. /
2. the
3. the
4. the
5. /
6. /
7. the
8. /
9. /
10. /

page 246 ex. 1
1. an hotel
2. an umbrella
3. an hour
4. a uniform
5. a euro
6. a yacht
7. an artist
8. an overnight flight