-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.
—My sports shoes are _____ out.—How long have you_____them?
I don't understand the story though there are___new words in it.
—What do you think of the lecture of Li Yang s Crazy English? —I think it's_________,but someone thinks it's much too _______.
Don't talk to Mary like that, she is only____ eleven-year-old girl.
There_______ a concert to be shown in Hong Kong next week.