【2013山东菏泽】The World Health Organization has given some advice on ______to protect us from being infected(感染) with H7N9.
The mobile phone has influenced people’s life a lot since it ____.
--Merry Christmas! --______.
Now the transportation is convenient.It’s only____ ride from here to Beijing.
He hardly gave his parents any problems,_____?
Her son _____ coke,but now he ____milk.