一束光由空气斜射入水中，若入射光线逐渐远离法线，则折射光线（　　）

A．也逐渐远离法线

B．逐渐向法线靠拢

C．传播方向不变

D．以上现象都有可能发生

The trip to the Mystery Caves will take place on Sunday, 27 July. You can book your tickets in Room 188 between 2:30 p.m. and 4:00 p.m. every day. Your parents should confirm (确认) the booking by writing to us as soon as possible. You should pay for the trip before 21 July. If we do not receive your money early enough, your booking will be cancelled(取消). If the trip does not take place for any reason, your money will be paid back.
We are planning to meet outside the railway station on Black Street at 8:00 a.m. It will take us about 2 hours to get to the center of the town by train, and from there we have to catch a bus. It will take another hour to get to the Mystery Caves on the bus.
We will spend about 1 hour and a half visiting the caves (山洞), and we hope to catch the 1:30 bus to Happy Lake for some swimming. If we are late, we will have to take the 3:00 bus straight back to Black Street.

If you do not pay for the ticket early enough,
[A] the trip will be cancelled
[B] you can write to Room 188"and pay later
[C] you won’t be able to take the trip