A：（x﹣1）2=6
B：（x+1）2=6
C：（x+2）2=9
D：（x﹣2）2=9
How long does it _______to go there by plane?
These animals are in danger．We should think ______ to protect them．
A. Great!
B. It's near the post office.
C. I go by ship.
D. She goes home by taxi.
E. Yes, you can.
