根据短文内容和所给的中文提示，在空白处填入单词的正确形式。每空限填一词。

Daming and Lingling are going to Los Angeles for summer holiday. There will be lots of activities for them. Summer English_____小题1:   (课程）will be   小题2:  (提供). They will start at the    小题3:     (开始）of July and August. The teachers are well-trained and very   小题4:     (有经验的）,they will check if all the students are    小题5:   (出席的）or       小题6:      (缺席的）every day. Students will have   小题7:  (每周的) test. They can stay with American families to take part in American life or choose hotel  小题8: (住宿). If you are also      小题9:    (感兴趣的) in it, you can come and fill in the      小题10:    (申请）form.

起下巾73mm的平式油管时，应选用公称尺寸（）mm的BD76／585型油管吊卡。

A.50

B.73

C.79

D.89