Please tell me changes ________ the number of the teachers.
A. into B. in C. on D. for
What do you think we can do wild birds?
A. protect B. protecting C. to protect D. protects
Today the forests are getting fewer and fewer. We must down too many trees.
A. keep people from cutting B. prevent people from cutting
C. stop people cutting D. All the above
Many birds live in Zhalong Nature Reserve .
A. all round years B. all year round
C. round all year D. the all years round
On the bus, we must make _________ for the old people.
A. a room B. rooms C. space D. a space
There will be ________ red-crowned cranes in the world.
A. less and less B. a little
C. more and many D. fewer and fewer
