海浪和海流的方向（）。
A．都是指来向
B．浪是指来向，流是指去向
C．都是指去向
D．浪是指去向，流是指来向
参考答案：B
Many people keep dogs as pets because dogs are regarded as () friends to people.
A. lonely
B. only
C. loyal
D. fair
