Dogs have a very good ______ of smell and are often used to search for survivors in the earthquake.
.---What______do you like?---I like tennis.
-You look so worried, what’s wrong? -More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
-----Would you like some______?-----OH, YES, just a little.
I have _________ in the morning.
I’m _____________.
