Word Building 练习题3: 1. His mother has a great (recover) from her injury . 2. The student is (help) to others. 3. Mike spent some years in the leading (industry) country. 4. Owing to a (short) of time, I gave up my travel plan. 5. We need some (skill) doctors to help the patients. 6. The government did its best to encourage (invest). 7. The (rise) food price is very frustrating. 8. The girl spent most of her (earn) on housing.