Each question has an underlined word followed by four answer choices. You will choose the word that is a necessary part of the underlined word.
Answer: Option C
All shoes have a sole of some sort.Not all shoes are made of leather (choice b); nor do they all have laces (choice c).Walking (choice d) is not essential to a shoe.
Answer: Option E
Water is essential for swimming-without water, there is no swimming. The other choices are things that may or may not be present.
Answer: Option D
Lightning is produced from a discharge of electricity, so electricity is essential. Thunder and rain are not essential to the production of lightning (choices b and d). Brightness may be a byproduct of lightning, but it is not essential (choice c).
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