The filter will probably best clean water obtained from which of the following?
A. Factories.
B. Inland seas.
C. Mountain streams.
Drug companies.
How long had the man had the car?
A. Six months.
B. Three weeks.
C. Eighteen months.
D. One year.
What does the water purifier remove from the water?
A. Salt.
B. Chemical pollutants.
C. Germs.
D. Minerals.
听力原文:W: Have you found anything wrong witi my stomach?
M: Not now. I'm still examining. I'll let you know the result next week.
What's the possible relationship between the two speakers?
A. Doctor and patient.
B. Husband and wife.
C. Teacher and student.
D. Father and daughter.