How should the phrase hot math classroom be altered in the following sentence? I wish my hot math classroom had air-conditioning because it gets so hot when the sun shines through the windows.

excruciatingly hot math classroom

NO CHANGE

math classroom

sweltering math classroom

Math classroom

Explanation:

Saying "hot" or a synonym of the word is repetitive since the sentence already describes the classroom as hot when saying "it gets so hot when the sun shines through the windows", therefore "I wish my math classroom had air-conditioning because it gets so hot when the sun shines through the windows." is the correct answer.

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the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).