Choose the correct word form to complete each sentence. 1. The store sold a wide of chocolates from all over the world. (various) 2. My sister waited a week to tell us about her . (pregnant) 3. The of fire was a very important event in the history of humanity. (discover) 4. Crops cannot grow in soil that is not . (fertility) 5. The doctor is able to treat the disease despite not being able to find its cause. (treatment) 6. Trish was brought up as an only child by his parents. (adoption) 7. The noise from the crowds on the streets was . (deafness) 8. Many of these courses require the of a project. (submit) 9. My grandmother gave a loud of delight when she saw the birthday cake we baked for her. (exclaim) 10. The stray cat was to approach us. (hesitate)