Stop! You can never touch this machine when it ________, it is very dangerous

Tu Youyou, 85-year-old Chinese female scientist, was awarded Nobel Prize in Physiology and Medicine in 2015.

. — We had a good time in the park lastSaterday. Pity you weren’t there.— I really ____ come but I was lookingafter my mother in the hospital.

Japan says its prime minister promised toprovide the world with "maximum transparency" about ____ accident atthe Fukushima nuclear power plant during _____ telephone call.

Is this your pencil–Yes, ______.