reacted

"0.5 is the reciprocal of 2."

"The school play will reenact the famous battle scene from the history book. "

"You can create the color orange by mixing yellow and red."

"My brother's opinion is the opposite of mine on the best way to study for the exam. "

"My daughter's teacher is very kind and helpful. "

"Hydrogen is the simplest chemical element, with only one proton in its atom. "

"The student's opposition to the new school rules caused a disruption. "

"It took him only twenty minutes to perform the task."

"His head made an impression on the pillow."

"What is the pronunciation of "hiccough"?"

"The teacher told us that the next exercise is to write an essay."

"The scientist studied the chemical composition of the soil sample. "