Read and choose. (选择恰当的句子完成对话)

Joy: Hi, Bill. This is Joy. Can you go skating with me tomorrow afternoon?

Bill:     C    I have to go home and do my chores.                          

Joy: What chores do you have to do?                                        

Bill: 1. _____                                                            

Joy: How often do you do these things?                                    

Bill: 2. _____ Do you have to do chores at home?                              

Joy: 3. _____ Can we play together this Sunday?                                

Bill: Sure! When will we meet?                                            

Joy: 4. _____                                                          

Bill: O! See you then.                                                    

Joy: 5. _____                     

A. I have to clean my room and wash my clothes.

B. No , I don't.                              

C. Sorry, I can't.                            

D. See you.                                    

E. Twice a week.                              

F. At ten o'clock.       

预防老年病人医院感染发生的最重要措施是（）。

A.工作人员认真洗手

B.保持室内环境整洁

C.加强生活护理

D.做好环境监测

E.减少介入性治疗的使用频率