1. 打开___________________　　　　　 2.重放___________________

24.对比：go to hospital　 go to the hospital

23.对比：on holiday　　 on business

22.what kind of ……

21.give sb. the right medicine

20.stay cool

19.take a photo /picture　 of…　 请帮我们拍张全家福.Please _________

　 take photos /pictures of …　 ________ ________ ______ my family.

18. pick up sth. (it/ them)

17. a piece of advice　　　 some advice　　　 ask sb. for advice

16．It is …for sb. to do sth.

It is kind /nice of sb. to do sth.

It’s very nice ______ you to get me two tickets of the World Cup.

It’s very dangerous________ children _________play in the street.