【2013山东菏泽】The World Health Organization has given some advice on ______to protect us from being infected(感染) with H7N9.
—What _______is your bag? —It’s yellow.
I am a student. ________name is Tom.
—What’s this ______ English? —It’s a pencil.
—Good morning, Eric. —________, Cindy.
We must be strict __________ourselves __________ our work.