The World Health Organization has given some advice on________to protect us from being infected(感染)with H7N9.
There are millions of websites on the Internet and there_____ a lot of useful ____on the websites
—What’s your favorite fruit?—Apples. You know, _______ apple a day keeps the doctor away.
-Can I join you? -----Sure, we are talking about _______.
--- Can you come to my house on Wednesday afternoon ? ---___ I have time that day!
It’s bad for your health to go to school breakfast.