—What can we do to________ bird flu from spreading?—Try not to buy or eat chickens that have not been checked.A. prevent B. cause C. discover
At last they all agreed________one million to the charity.
Seeing their teacher________into the classroom,they stopped________at once.
—________? —I have a headache and I don’t feel like eating anything.
—She didn’t do any housework at home. —________.
Could you please________late for class next time?