—What are the school rules?—We ________ arrive late for class.
the children have fun, parents can take dance lessons on the beach.
The World Health Organization has given some advice onto protect us from being infected(感染) with H7N9.
—Linda, I called you this morning, but nobody answered the phone. —I'm sorry. I football with my friends then.
—Why do you collect so many old bikes? —I'Il have them _ and give away to the children who don't have bikes.
—Can we run across the road now? —No, we _. We have to wait until the light turns green.