B. Complete each of the following sentences with the most appropriate word from the box self-esteem diluted refute transformed livelihood stitch grassroots dwindling potency aloof insidious 1. The ________________ of most people in the countryside of Ethiopia is based on agriculture. 2. Some university students are known to be _____________ because of their shyness, avoiding mixing with others. 3. In most organizations, decisions are made by the top management without considering the views and concerns of those at the __________ level. 4. If you want to ___________pieces of cloth together, you need to use a needle and thread. 5. The sauce is too salty to eat. Add more water to it to ______________ the salt concentration. 6. The medicine must have lost its _________________ since it expired six months ago. 7. Some diseases, such as heart problems, hypertension and diabetes are ___________ and the victims cannot know they are suffering from them. 8. The productivity of the land has been ________________ due to many years of farming without fertilizer. 9. The regular physical exercise and the adjustment he has made in his diet have ___________ his health conditions. 10. In order to __________________ his accusations, you need to have strong evidence.