—Are you going on a trip to Huai’an these days?—I haven’t made a _____ yet. It’s really hard for my family to reach an agreement.

---_____ do you eat junk food? --- I like it. I eat it three times a week.

 —___________, can you tell me the way to the People’s Hospital?—Oh, turn left at the second crossing and you will find it on your left. 

Before I talked with ______ scientist, I had never met ______ knowledgeable person like him.

You will not be allowed to get into the plane_______ you pass security checks(安检).