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"She is giving her friend a book. "

"The sender of the package forgot to include a return address. "

"The teacher marked the student's paper with a red pen. "

"The product is undergoing a change in order to improve it."

"Print the draft double-spaced so we can mark changes between the lines."

"The lab technician carefully measured the formalin for the experiment. "

"The address on the envelope was 123 Main Street. "

"There are twenty-six letters in the English alphabet."

"The detective is identifying the suspect in the security footage. "

"We saw the internal compartments."

"My correspondence with my pen pal was very enjoyable; we discussed our favorite books and hobbies. "

"The recipe called for a specific portion of flour, not the entire bag. "