Qomolangma is very dangerous________．
A．climbing
B．to climbing
C．climb
D．to climb
The main reason is________endangered animals．
A．to protect
B．protect
C．to protecting
D．protects
Please write as________as you can．
A．careful
B．care
C．carefully
D．more careful
One fifth of the population in that country________from China．
A．is
B．are
C．am
D．be
—________is the population of the city？
—About one million．
A．What
B．How many
C．How
D．How much
China has________population in the world．
A．the bigger
B．the biggest
C．the more
D．the most
