7.听第10段材料,回答第17至20题.
17.What is Mrs.Brown?
A.She is the headmaster.
B.She is in charge of the school trip next week.
C.She is a manager of the tour company.
18.Why must School Trip Permission Note be signed by their parents?
A.Because they can go with their parents.
B.Because they can be protected by their parents.
C.Because the note is for insurance purpose.
19.What should the students be very careful to wear?
A.They should be very careful to wear old clothes.
B.They should be very careful to wear dark glasses.
C.They should be very careful to wear strong shoes.
20.What is the purpose of the speaker?
A.To tell the students the questions they should pay attention to.
B.To tell the students some places they will visit.
C.To tell the students something they should take along.