The number of private cars in urban areas should be limited ___________the number of public buses should be increased.
A．when B．while C．unless D．until
the teacher us, we can make great progress.
A．With; to lead B．With; lead C．As; lead D．As; leading
The young man tried to live by writing, but it didn’t provide a good enough ___________.
A．money B．value C．bill D．income
China is a _____ country _____ to the third world.
A．developed; belongs B．developing; belonging
C．developing; belonged D．developed; belonged
It is _______ pleasant surprise to learn that Mary is ______ great success as a writer.
A．a; a B．/; / C．a; / D．/; a
After the explosion，the roads are full of ________people leaving the city.
A．afraid B．frightened C．frightening D．scary
