2. Fifty minutes (be)___________the maximum length of the time allowed for the exam.

3. Many people in the world (not have) ___________enough food to eat.

4. The poor (need)___________ help from the community.

5. Listening to loud music at rock concerts  (cause)_______ hearing loss in some teenagers these days.

6. There (be) ___________a lot of sheep in the field.

7. Ten miles (be) ___________ too far to walk.

8. Not only John but also his friends (want) ___________ to buy this race horse.

9. A number of students (recently participate) ___________ in intensive language programs abroad.

10. Sarah, along with 20 students, (plan) ___________a party now.