Just_______ here and don't go anywhere, or your parents won't find you.
| A．to stay | B．stays |
| C．stay | D．staying |
—He is late for the meeting.
—
A．So I am. B．So am I. C．So do I.
—What a nice motorbike! How long have you it?
—About half a year.
A．had B．bought C．taken
There are several chemical factories waste water into the river.
A．pour B．pouring C．pours
Last year，the population of that city 7,120,000.
A．was B．were C．has
In our class, about of the students are girls.
A．three fifth B．third fifths C．three fifths