Word formation

Choose the correct noun form: The teacher gave a long ______ about volcanoes. (explain)

Fill in the blank: We all admired her ______ to finish the project. (determine)

Choose the correct noun form: He got a lot of ______ from his teacher. (encourage)

Fill in the blank: Clean air is important for our ______. (exist)

Choose the correct noun form: The storm caused a lot of ______ to the village. (destroy)

Fill in the blank: The dog showed great ______ while waiting for food. (patient)

Choose the correct suffix: inform → inform____

Choose the correct suffix: differ → differ____

Fill in the blank: The class showed real ______ during the science fair. (excite)

Choose the correct suffix: create → creat____