One third of the country________covered with trees and the majority of the citizens________black people.
| A．is; are | B．is; is |
| C．are; are | D．are; is |
In any unsafe situation, simply _________ the button and a highly-trained agent will get you the help you need.
| A． |
press |
B． |
to press |
C． |
pressing |
D． |
pressed |
China's high-speed railways _________ from 9,000 to 25,000 kilometers in the past few years.
| A． |
are growing |
B． |
have grown |
C． |
will grow |
D． |
had grown |
During the Mid-Autumn Festival, family members often gather together _________ a meal, admire the moon and enjoy moon cakes.
| A． |
share |
B． |
to share |
C． |
having shared |
D． |
shared |
She and her family bicycle to work, _________ helps them keep fit.
| A． |
which |
B． |
who |
C． |
as |
D． |
that |
Susan had quit her well-paid job and _________ as a volunteer in the neighborhood when I visited her last year.
| A． |
is working |
B． |
was working |
C． |
has worked |
D． |
had worked |