Question

before you start reading... here are the vocabulary words that will be in this reading. lets see how well you already know them. check the box that shows how well you know each word. its ok if you dont know them yet (this is not graded)! 2. word changer words have different forms when we use them in different ways. write the correct vocabulary word, in its correct form, in each blank. chemicals are __________ the water supply. many are concerned about toxic __________ from nuclear waste. 3. after reading and exploring the words through some activities... do you know these words better? check the box that shows how well you know each word. its ok if you dont know them yet (this is not graded)!

Explanation:

For the first blank, the present - continuous tense is needed as the action is ongoing. "Contaminating" is the present - participle form of "contaminate" which fits the context of chemicals affecting the water supply. For the second blank, "radiation" is the appropriate noun form to refer to the toxic substance from nuclear waste.

Answer:

contaminating
radiation