1.He behaved (behave)as though nothing had happened.
2.Do something to help yourself. The best way to stop feeling depressed (depress)is to take action.
3. Strengthening (strength)social development is an important guarantee of maintaining social harmony and stability.
4.We sincerely (sincere)hope to cooperate with you, and we will supply you with the best products and service.
5. In summary, no approach is going to be the best for all applications.
6.When my father lost his job, our living expenses (expense)had to be cut to the bone.
7.Business is booming (boom)and foreigners are showing more interest in investment.
8.One loses by pride and gains (gain)by modesty.
9.She qualified (qualify)as a doctor last year.
10.James Watson and I gave a slide and video presentation (present)about the new approach to training.