The children love _________ computer＿＿＿．

---DO you have any       for this summer vacation? ---I want to take a trip to Qinghai.

—You look so worried, what’s wrong?—More and more people like me become to worry about the __________ pollution  after the haze (雾霾) appeared in Beijing and some other cities in China.

------ Taking a walk in the evening is a good ______ . ------ So it is .It keeps us healthy.

—What do you want?—I want a______.