填入所给名词的正确形式。
⑴The ________are playing football now. (child)
⑵There are two ________ in our school. (policeman)
⑶Could you please give me some ________? (milk)
⑷I want some ________ for lunch. (tomato)
⑸I can see a lot of ________ on the grass. (sheep)
⑹June 1st is ________ Day. (child)
⑺May 12th is the International ________ Day. Let’s say “Thanks” to them for their work. (nurse)
⑻We’ve got a lot of new ________ in our school library. (magazine)
⑼It’s only about an ________ flight from Qingdao to Beijing by air. (hour)
⑽At the ________ of seven， the lonely girl had to work to make a living. (age)