Từ vựng

“Iron will react with oxygen and moisture to form rust.”

“The chemical reaction creates bubbles and causes the mixture to foam.”

“Registration closes twenty minutes before the race starts.”

“The science group conducted research on solar energy storage.”

“Scan the text for the names of the researchers.”

“He resat the chemistry exam after failing on his first attempt.”

“Students who failed the exam must retake it next Monday.”

“She revised the itinerary after the flight was canceled.”

“My tennis skills are a bit rusty.”