-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.
There are three______ workers in this factory. My brother is in it ,too.
Is therewrong with my computer? No, it works well.
The boy, _______ his father, ____ playing basketball.
Now children, turn to Page _____ and look at the _____ picture in Unit 1.
—Listen, the music sounds_______ .I like it very much. —It’s Yesterday Once More, my favourite.