About one fifth of the world population Chinese. China is a country with population in the world.
A．is; a largestB．are; the largestC．is; the largest
The doctor did everything they could the dying boy’s life, but they failed.
A．savingB．to saveC．saved
I’d like to walk to the park instead of there by bus.
A．goingB．goesC．to go
we were quite tired, we still went on working.
A．Because; /B．Although; butC．Although; /
—I’ll return the book to Mary, but I can’t find her anywhere.
—She the teachers’ office. You can find her there.
A．have gone toB．has gone toC．has been to
—Forests are very important, aren’t they?
—Yes. They can prevent the water washing the earth away.
A．forB．toC．from
