For forty years Jane has been ___________ about making the rest of the world understand and respect the life of these animals.

Is this _______ pencil case? –No, it’s ______ eraser．

Would you like some coffee? — Yes, please. By the way, do you have any milk? I prefer coffee _____ milk. [ ]

I’m having a good time __________photos. It’s interesting.

This library has available _____ you want to borrow for your school．