We must protect wild birds and animals because they are .
If we ______ take environmental problems seriously, the earth _______ worse and worse.
---How do you like the talk show?---I think it’s __________, but some people think it’s so _________.
My coat costs little. What about ________?―_______ is expensive.
She got a nice skirt as a present on her birthday.Do you know _______ ?
The river near our village is about _______ long.